1. There are 1 numbers from 1 to1.There are 1 1 to 100 * * numbers. There are 300 numbers from 10 1 to 200***. In other words, the number of numbers to be used in 200 pages is:

11+181+300 = 492 (piece)

Judging from the known quantity, the remaining figures are:

723-492 = 23 1 (piece)

Use 3 numbers per page, and you can also edit:

23 1 ÷ 3 = 77 (page)

So this book has 277 pages.

2.( 1)

Another day, 1+ 1 = 2, so that day is Monday.

(2) If the tires are not changed, the car will travel 32,000 kilometers per tire. * * * has four tires, and * * * will drive:

32,000× 4 =128,000 (km)

Now five tires are used in rotation, which requires each tire to have the same degree of wear, that is, each tire has the same mileage.

128000 ÷ 5 = 25600 km

The average age is 42 years old, so the total age of the three people is

42×3= 126

Suppose B's age is X, then A's age is (2x-7) and C's age is 4x.

So, C's age is

According to the meaning of the question, this athlete should get 5 points. Excluding one highest score and one lowest score, the other three scores are 9.58× 3 = 28.74.

Excluding the highest score, the total score of the other four is 9.46× 4 = 37.84.

Excluding one lowest score, the total score of the other four is 9.66× 4 = 38.64.

So the highest score is 38.64-28.74 = 9.9.

The lowest score is: 37.84-28.74 = 9. 1.

Their difference is: 9.9-9. 1 = 0.8 (minutes).

If there are x boys in the fifth grade, there are 76-X girls. Make an equation according to the meaning of the question.

There are 76-42 girls = 34.

There are more boys than girls in grade five.

42-34 = 8 (person)

6. According to the meaning of the question, the relationship between the prices of the three commodities is:

Coat+hat+shoes = 140 (1)

Big coat = 90 (2)

Coat+hat-shoes = 120 (3)

It is actually a system of linear equations with three variables.

( 1)+(3)

Two coats and two hats = 260.

1 coat+1 hat = 130 (4)

Coat from (2)+(3) = 1 10 (yuan)

Hat = 20 (yuan)

Substitute (1) to get the price of a pair of shoes.

140-110-20 =10 (yuan)

7. it is necessary for ship a to catch up with ship B.

15 ÷ (6-5) = 15 (hours)

It is necessary for ship A to catch up with ship C.

15 ÷ (6-3) = 5 (hours)

It is necessary for ship B to catch up with ship C.

15 ÷ (5-3) = 7.5 (hours)

〔 15,5,7.5〕= 15

Minlang's elegy met again in 15 hours.

8. According to the meaning of the question, the speed is less than 100 km/h, but not less than 25 km.

So after two hours, the number on the automobile odometer can be set to

16a6 1 when a>0, the minimum value is 1.

16 16 1- 1595 1=2 10

That is, the car travels more than 200 kilometers in two hours, which does not meet the meaning of the question. Therefore, the odometer number with a = 0 is 1606 1.

Cars run every hour.

(16061-15951) ÷ 2 = 55 (km)

9. Some people think that19.5 ÷1.5 = 13, then13 cars can carry all these boxes away, which is a misunderstanding. The goods are packed in whole cases, and every car is not necessarily full.

If there are 65 cases of goods * * *, the weight of 64 cases in * * * is 30 1 kg, and the weight of 1 case is 236 kg, so the total weight is

30 1× 64+236 = 19500 (kg)

30 1× 5 = 1505 (kg)

That is, the weight of five cases is 1.505 tons, exceeding 1.5 tons. So each car can only hold four boxes at most, and 15 car can only hold 60 boxes. There are also four boxes of 30 1 kg, 1 box, weighing 236 kg. Do you need two cars? We can arrange 16 cars.

Obviously, 301× 4+236 =1440 (kg), that is, no more than 1.5 tons.

The above is just an example. The weight of each box is only required to be no more than 353kg. There are no other restrictions. It is also necessary to verify the general situation, and all 16 cars can be delivered.

Let 12 truck load just over 1.5 tons, and the last box will not exceed 1.5 tons. Then 12 shall be packed with 3 cars, each with 4 boxes, and the total weight of 4 boxes shall not exceed 353× 4 = 14 12 (.

At this time, the 15 car has loaded all the goods of the original 12 car, and the total weight exceeds 1.5× 12 = 18 (tons).

And each car does not exceed 1.5 tons, and the remaining goods are insufficient.

19.5-18 =1.5 (ton)

Can be loaded on the 16 car.

10. Because the number of people listening to Chinese class is six times that of math class, the total number of people attending classes is a multiple of seven.

The total number of people in 13 group is 160.

So 160 minus the group that didn't attend the lecture must be a multiple of 7, which can only be verified by trial calculation.

160-13 =147 meets the requirements.

So the group that didn't attend the class is the ninth group.

Xiamen primary school 2000-200 1 second semester mathematics subject competition volume (group b)

First, multiple-choice questions, add the question number of the correct answer to the horizontal line.

1, at least () identical cubes can be combined into a larger cube.

A: 4 pieces B: 6 pieces C: 8 pieces D: 16 pieces.

2. Divide all natural numbers by divisors, which can be divided into ()

A: prime number and composite number B: odd number and even number C: prime number, composite number and 1.

3. There are () simplest scores * * * in units of scores.

A: 5 b: 1 c: 9 d: countless

4. If the length, width and height of a cuboid expand by 3 times, its volume will expand by () times.

A: 3 B: 6 C: 9 D: 27

5. In the following formula, the question number is Yes (). This formula is an expression of divisibility.

a: 12÷0.2 = 60 B: 1÷ 1 = 1 C:0.8÷0.2 = 2

6. Multiply all three-digit prime numbers, and their product is ()

A: odd number b: even number c: prime number

7. The numerator and denominator of a fraction are different prime numbers, and this fraction () is the simplest fraction.

A: It must be B: It must not be C: Not necessarily.

8, numerator plus 6, to make the size of the fraction unchanged, the denominator should be ().

A: add 6 B: add 8 C: multiply 3 D: multiply 6

9. As shown in the figure on the right, a cuboid block with the length, width and height of 15cm, 10cm and 5cm respectively, after being divided into three small cuboids, the surface area increased by () square centimeters.

A: 50 B: 100 C: 200 D: 750

10, it takes 6 minutes to cut a stick into three parts. According to this calculation,

If you cut it into four sections, it will take () minutes.

A: 6 B: 8 C: 9 D: 12

Fill in the blanks.

1, A=2×3×5×7, B=3×3×5×5, the greatest common divisor of a and b is, and the least common multiple is.

2, can be divisible by 2 and 3 at the same time the largest three digits is.

3. A cuboid, the sum of its sides is 36 cm, and its width and height are 2 cm and 1 cm respectively. The surface area of this cuboid is square centimeters.

The special fragrant bag shop bought some eggs, the total number is less than 200. Three will leave two, four will leave two, five will leave three, and these eggs will have at most one.

5, a row of telephone poles, the distance between every two is 30 meters, and now it is changed to 45 meters. If one pole of the starting point does not move, at least the other pole does not need to move every other meter.

6. From noon 12, the hour hand and the minute hand meet, and at midnight 12, the hour hand and the minute hand can still meet.

Meeting time.

7. Li Ming has 26 more story books than Wang Hong, but if Li Ming gives Wang Hong one, it will be two less than Wang Hong.

8. Buy 2 bottles of white wine and 12 bottles of beer * * Use 4 yuan. It is known that the price of a bottle of liquor is equal to the price of eight bottles of beer, so a bottle of liquor and a bottle of beer need RMB * * *.

Third, the application problem.

4. Guangming Paper Mill produced a batch of newsprint, which was originally planned to be completed in 28 days, with a daily output of 12.5 tons. Now it's finished three days ahead of schedule. How many tons are actually produced every day than originally planned?

5. Li Shifu has produced a batch of parts. Three days ago, 126 parts were produced. According to this calculation, it takes 12 days to complete the production task. How many parts are there in this batch?

The chemical fertilizer plant planned to produce 84 tons of chemical fertilizer in 30 days, but actually produced 0.2 tons more than planned every day. How many days did it actually finish the task ahead of schedule?

7. Processing a batch of clothes, 300 sets a day, 16 days can be completed. (1) If 400 sets are processed in one day, how many days in advance?

(2) If 20 sets are processed every day, how many days can it be completed? (3) If it is to be completed five days in advance, how many sets will be processed every day?

8. A car factory planned to produce16,800 cars throughout the year, and as a result, the annual production task was completed two months ahead of schedule. At this rate, how many cars can be produced throughout the year?

9. To produce 7 tons of chemical fertilizer, it has been done for 4 days, producing 0.75 tons per day, and the remaining 5 days will be completed. How many tons per day?

10, a clothing factory used to make a children's dress, using 2.2 meters of cloth each time. Now the cutting method has been improved, and each set saves 0.2 meters of cloth. The cloth used to make 600 sets of this kind of clothes, how many sets can be made now?

1 1. Xiaohong bought three exercise books and three new word books, one at 0.36 yuan and the other at 0.32 yuan. How much did Xiaohong spend less on new word books than on exercise books?

12, students carry water to water trees. Forty-five trees were watered in the third grade, 10 fewer trees were watered in the third grade than in the fourth grade, and half fewer trees were watered in the fourth grade than in the fifth grade. How many more trees are watered in the fifth grade than in the third grade?

14, the speed of the car is 63 kilometers per hour, and the speed of the car is 1.4 times that of the truck. They started from two places 270 kilometers apart at the same time and drove in opposite directions. (1) How many hours did you meet? (2) How many kilometers did the two cars travel when they met?

15, 0.40 yuan for exercise books and 0.32 yuan for pencils. The teacher asked Xiaohu to buy some exercise books and pencils, and the total price was just given by the teacher 10 yuan. But the tiger confused the number of exercise books with the number of pencils and got back 0.56 yuan. So how many exercise books is the teacher going to let the tiger buy?

16, there is an east-west tunnel. Measure the tunnel length, a from east to west, draw a mark (including the starting point) every 7 meters, and b from west to east, draw a mark (including the starting point) every 9 meters. Among all these markers, the distance between the nearest two markers is 0.5 meters, and the minimum distance of several markers like this is 3 1, so how long is this tunnel at least?

/kloc-Class 0/7 and Class 5 went to the factory to paste cartons./kloc-Class 0/Class 45, Class 2 42. There are 1566 * * boxes. How many cartons are posted per class on average?

Grade 5 1 class 18 was filmed in 3 groups. The first group 10 people, * * * hit 28; The second group 1 1 person, * * * shot 33 times; The third group of 9 people, * * * hit 23. How many shots did everyone in the class hit on average?

19,2001July 13, Beijing successfully won the right to host the 2008 Olympic Games. The total number of votes in the second round 105, Beijing got 56 votes. What percentage of the total votes did Beijing get?

20. A workshop of Xinfeng Agricultural Machinery Factory processes 2480 parts. Originally, 100 pieces were processed every day, and after working for 20 days, 120 pieces were processed every day. So we can finish the task in a few days.

2 1, cuboid wood, with a cross-sectional area of 0. 15m2 and a length of 4m. What is the volume of seven such pieces of wood?

It used to take 4.8 hours to assemble a machine, but now it only takes 3 hours. I used to need 120 machines. How many machines can I make now?

23, according to the following information, find out the price per ton of feed. The feed company sold 36 tons of feed in September, 45 tons in1October, more in1October than in September 135 yuan, more than two months 12 15 yuan.

24. There are 250 cows this year, eight fewer than last year's three times. How many cows were raised last year?

25. The PLA has afforested its barracks, planting 98 Chinese fir trees and 63 poplar trees, with 7 Chinese fir trees and 7 poplar trees in each row. How many rows are there more fir trees than poplar trees?

26. A typist plans to finish a 4500-word manuscript in 1 hour. She typed for 65,438+05 minutes. After checking, the number of words typed was exactly 65,438+0,230. At this rate, can she finish the manuscript on time?

27. To produce a batch of parts, it is planned to make 30 pieces every day and complete them in 24 days. Actually, it costs 60 yuan a day. How many days can the task be completed in advance?

28. A pack of instant noodles is 2.30 yuan, a pack of biscuits is 3.60 yuan, and a pencil 1.80 yuan. Xiaoming bought 8 packets of instant noodles, 1 packets of biscuits and 2 pencils. Is it enough to bring 25 yuan?

29. The distance between Wang Lin's home and school is 980 meters. One day, when Wang Lin went to school from home and walked 200 meters away from school, she suddenly remembered that she had forgotten to bring a marker. She hurried home to get a marker and then went to school. How many roads did Wang Lin walk this time?

30. The distance between Wang Lin's home and school is 980 meters. One day, when Wang Lin went to school from home and walked 200 meters away from school, she suddenly remembered that she had forgotten to bring a marker. She hurried home to get a marker and then went to school. How many roads did Wang Lin walk this time?

3 1, Wang Ming and Li Li ride bicycles from Shuofang to Wuxi at the same time. Three hours later, Wang Ming overtook Lili 12 km, and Wang Ming's average speed was 16 km. How many kilometers does Li Li run per hour on average?

32. Two cars, A and B, set off from a distance of 950 kilometers at the same time and met for five hours. A car speed 105 km, B car speed how many km? (Solve in two ways)

In a bookshelf, there are three times as many books on the upper floor as on the lower floor. If you move 18 books from upstairs to downstairs, then the books on the two floors are equal. How many books are there on the upper and lower floors?

34. Dr. Li gave a prescription to a patient, 0. 1mg each, 0.2mg each time three times a day, for one week. If a bottle of this medicine contains 50 tablets, is it enough to buy only one bottle now?

35. Laying120m long tap water pipeline, with 3m and 5m pipes. Suppose you were a construction worker, how many pipes would you use?

36. Travel agencies offer two preferential schemes for a one-day tour of a scenic spot: A: adult 160 yuan, and child 40 yuan; B: Each person in a group of more than 5 people 100 yuan. If there are six adults and three children traveling together, which scheme saves money?

There are two wires of the same length. The first one needs18m, and the second one needs 25m. The remaining wire is just twice as long as the second one. How many meters are left in the second one?

There are two ways to express the size of shoes sold in shops: "cm" and "size". It is known that 19 cm is equivalent to 28 yards, and 13.5 cm is equivalent to 17 yards. So how many yards is 17.5 cm equivalent? How many centimeters is 36 yards equivalent?

39. There are the same number of balls in six boxes. If you take out six balls from each box, the remaining balls in the six boxes are equivalent to the number of balls in the original two boxes. How many balls are there in each box?

40. A table has four legs, a washstand has three legs, and the existing tables and washstands have 100, with a total of 340 legs. How many of these two commodities are there?

4 1, the printing factory printed 8540 books in 4 hours. According to this calculation, how many books can be printed in three hours?

42. The fruit shop distributed 2,488 kilograms of apples, four times as much as bananas, and the bananas distributed were 307 kilograms less than oranges. How many kilograms of apples and oranges did the fruit shop send?

43. It takes 13 hours to get from A to B by train, and the local train is 99 kilometers per hour. If you change to an express train, it's 44 kilometers faster than taking a local train. How many hours does it take by express train?

44. physical education class students line up. There are 8 boys in the first team, and 4 girls are arranged between every 2 boys. How many girls are there in Class One?

45. The watch factory produced a batch of watches. The original plan was to produce 672 watches every day, which was completed in 15 days. Actually completed 3 days ahead of schedule, how many pieces are actually produced every day?

46. The price of three tape recorders is less than that of 1 black and white TV set by 52 yuan, and the price of five black and white TV sets is equivalent to that of 1 color TV set. How much is each tape recorder 187 yuan and color TV?

47. Fishing in Dongkeng Reservoir, the first time caught 2970 kg less than the second time, and the second time caught 2970 kg less than the first time 170 kg less. How many kilograms did you catch for the second time?

48. The distance between Party A and Party B is1200km. Two cars leave from two places at the same time. Car A travels 90 kilometers per hour, and car B travels 80 kilometers per hour. A few hours later, the distance between car A and car B is180km.

49. Make a 15 uncovered cubic iron box with a side length of 15cm. How many square centimeters of iron sheet should be used at least?

50. My grandfather is 60 years old and my grandson 12 years old. A few years later, my grandfather was three times as old as my grandson.

5 1, warehouse a has 100 tons of fertilizer, and warehouse b has 140 tons of fertilizer. How many tons of fertilizer have been transferred from warehouse A to warehouse B, and the fertilizer in warehouse B is twice as much as that in warehouse A?

52. Insert the bamboo pole into the water. The soaking part is 0.9 meters. Turn around and insert the other end into the water. At this time, the bamboo pole is only half 0.4 meters dry. How long is this bamboo pole?

53. A rectangular iron sheet with a length of 32 cm and a square iron sheet with a length of 4 cm, cut off at each corner, and then make an open iron box. The volume of this iron box is 1920 cubic centimeters. What is the area of this iron sheet?

54. Give a pack of fruit candy to a group of children, 5 yuan each, with 16 left. If there are 7 pieces each, the difference is 12 pieces. How many children are there in this group? How many pieces of fruit candy are there in this bag?

55. There are 83 male and female workers in a workshop, of which the number of male workers is more than three times that of female workers. How many men and women are there?

56. There are 252 red balls, 396 blue balls and 468 yellow balls. Put them in n bags, and ask that there are red, yellow and blue balls in each bag, and the number of red, yellow and blue balls in each bag is equal. What is the maximum value of n?

57. The average weight of Zhang, Wang and Li is 63 kilograms. The average weight of Zhang and Wang is 3 kilograms heavier than that of Li, and Zhang is 2 kilograms heavier than Li. What is Wang's weight?

58. Bonuses are divided into first prize, second prize and third prize. Each first prize is twice as much as each second prize, and each second prize is twice as much as each third prize. If the first prize is 1, the second prize is 2 and the third prize is 3, then the first prize is 120 yuan. If there are 1 first prize winners, 3 second prize winners and 5 third prize winners, what is the first prize?

59. During the Spring Festival, Miss Wang went to the grocery store to buy sweets. Mr. Wang's money can only buy 20 kilograms of chocolate candy or 30 kilograms of cream candy. Teacher Wang calculated and decided to buy 8 kilograms of chocolate candy first, and the rest of the money to buy cream candy. How many kilograms of toffee can he buy?

The fruit shop sent five baskets of apples and five baskets of pears. A * * * weighs 225 kilograms, and it is known that each basket of apples is 5 kilograms heavier than each basket of pears. How much does each basket of apples and pears weigh?

6 1. There are 82 workers in the two engineering teams A and B. If 8 workers are transferred from team B to team A, the number of the two teams is exactly equal. How many people are there in Team A and Team B?

62. Children make 27 red, yellow and white flowers, of which yellow flower is twice as big as white flower and red flower is three times as big as yellow flower. How many are there in each of the three flowers?

63. A cuboid wheat barn, measured from the inside, is 5 meters long and 3.6 meters wide, and the height of wheat stored in the barn is 1.5 meters. If wheat weighs 750 kilograms per cubic meter, how many kilograms are there?

64. It is known that a father is 30 years older than his son, and this year his age is exactly seven times that of his son. How old are father and son this year?

65. The oil in barrel A is four times that in barrel B. If you take 18kg from barrel A and pour it into barrel B, the weight of the two barrels of oil is equal. How many kilograms are there in two barrels of oil?

66. My local chicken adds 7, multiplies 7, subtracts 7, and divides 7, and the result is 7. Please calculate, how many chickens are there in my family?

67. The original Chinese fir poles on a certain line are 7 1 root, and the pole spacing is 25m. Now, all the Chinese fir poles in the original line have been replaced by cement poles. How many meters is the interval between rods at this time?

68. There is a bus road in a city, with a length of16500m from the starting point to the ending point, and an average stop of 500m. How many stops should there be in the middle of this road?

69. Give a pack of fruit candy to a group of children, 5 yuan each, with 16 left. If there are 7 pieces each, the difference is 12 pieces. How many children are there in this group? How many pieces of fruit candy are there in this bag?

70. My grandfather is 60 years old and my grandson 12 years old. A few years later, my grandfather was three times as old as my grandson.

7 1. A ship, traveling at a speed of 14 kilometers per hour in calm lake water, is now entering this river flowing at a speed of 2 kilometers per hour. How many kilometers did the ship travel in five hours? What will happen if you drive along the river for five hours?

72. There are chickens and rabbits in the same cage today, 35 above and 94 below. How many chickens and rabbits are there?

73. Squirrels pick pine nuts, 40 in sunny days and 25 in rainy days. It has been collected for several days, and * * * has collected 280 pieces, with an average of 28 pieces per day. How many sunny days are there these days?

74. An express train departs from Tianjin with an average speed of 79 kilometers per hour; At the same time, there is a slow train from Jinan with an average speed of 40 kilometers per hour. How long is the railway from Tianjin to Jinan three hours after the two cars meet? (Answer in two ways)

75. An express train departs from Tianjin with an average speed of 79 kilometers per hour; At the same time, there is a slow train from Jinan with an average speed of 40 kilometers per hour. How long is the railway from Tianjin to Jinan after three hours' drive?

76. The railway from Tianjin to Jinan is 357 kilometers long. An express train leaves from Tianjin and a local train leaves from Jinan. The two cars are driving in opposite directions. After meeting for three hours, the average speed of the express train is 79 kilometers per hour, and the average speed of the local train is how many kilometers per hour?

77. At the same time, two cars left two stations 237 kilometers apart, and three hours later, the two cars met. One car is 38 kilometers per hour, how many kilometers is the other car?

78. The distance between the two railway stations is 260 kilometers. Two trains, A and B, leave from two stations at the same time and meet in 2.5 hours. A car is 48 kilometers per hour, and B car is how many kilometers per hour?

79. Two construction teams dug a tunnel with a length of117m. From one end to the other, it will be opened in 13 days. Team A digs 4 meters every day, and how many meters does Team B dig every day?

80. There are two bags of rice. The weight of bag A is 1.2 times that of bag B. If you put another 5 kilograms of rice in bag B, the two bags will be equally heavy. How many kilograms are there in two bags of rice

8 1. A cuboid bunker is 4m long, 2m wide and 0.5m deep. If the yellow sand weighs 1.4 tons per cubic meter, how many tons does it weigh?

82. A rectangular tin tank is 18 decimeter long and 10 decimeter wide. It is understood that this water tank can hold 1620 liters of water at most. How deep is this tank?

83. The cuboid plastic box containing liquid medicine is 0.6m long, 0.25m wide and 0.5m deep. If you put the whole box of medicine into a small bottle with a capacity of 400ml, how many bottles can this box hold at least?

84. A cubic billet is 6 cm long and forged into rectangular steel with a cross section of 3 cm long. How many meters is steel?

85. A cuboid oil drum with a bottom area of 18 square decimeter can hold 43.2 kilograms of oil. If each liter of oil weighs 0.8 kg, what is the height of the oil drum?

86. In a glass jar with a length of 25cm and a width of 20cm, there is a cubic iron block with a length of10cm. At this time, the water depth is 15 cm. If this iron block is taken out of the jar, how many centimeters is the water depth in the jar?

87. A cuboid fuel tank has a square bottom, and the side length measured from the inside is 6 decimeters. It contains 144 liters of oil. As we all know, the depth of the oil inside is half that of the oil tank. How many decimetres is this oil tank?

88. One room 1200 wooden floor, 40 cm long, 20 cm wide and 2 cm thick. How many square meters does this room occupy? How many cubic meters of wood does it take to spread out this room?

89. A section of rectangular steel, with a length of 1.6 m and a cross section of 4 cm square. It weighs only 7.8 grams per cubic centimeter. How much does this square steel weigh?

90. Make an uncovered cuboid oil drum with iron sheet. The length and width are 4 decimeters and the height is 6 decimeters. How many square decimetres is the iron sheet? Put gasoline in a barrel, and each liter of oil weighs 0.82 kg. How many kilograms of gasoline can this barrel hold?

9 1. A cubic billet with a side length of 0.6 meters was forged into a rectangular steel with a cross section of 0.09 square meters. How long is forged steel? (Equation solving)

92. A rectangular glass cylinder, measured from the inside, is 40 cm long and 25 cm wide, and the water depth in the cylinder is 12 cm. After a stone is immersed in water, the water surface rises to 16 cm, and the volume of the stone is found.

93. How many square meters of iron sheets will be used to make 12 rectangular iron chimneys with a length of 2m, a width of 4m and a height of 3m?

94. The floor of Xiao Min's room is rectangular. How many cubic meters of wood does it take to lay a wooden floor 5 meters long, 3 meters wide and 2 centimeters thick?

95. Seen from the inside, a coal truck is 2.5 meters long, 0.8 meters wide and 0.6 meters high with an average weight of 0.5 tons per cubic meter/kloc-0. How many tons of coal does this truck carry?

96. A rectangular tin bucket without a lid, the bottom of which is a square with a side length of 4m and a height of1m.. How much iron does it take to make such a barrel? How many liters of water can this barrel hold?

97. The stadium was paved with 37.5 cubic meters of cinder on a straight track with a length of 100 meters and a width of 7.5 meters. How thick can cinder be spread?

98. A rectangular children's swimming pool is 40m long, 14m wide and 1.2m deep. How many square bricks with an area of 16 square decimeter should be pasted on the wall and bottom of the pool now?

99. A cuboid container with a bottom area of 16 square decimeter and a water height of 6 decimeters is now placed in an iron block with a volume of 24 cubic decimeters. How high is the water surface at this time?

100,2100 Cubes with side length of 1 cm are stacked into a cuboid. Its height is 10 cm, and its length and width are greater than its height. What is the circumference of its bottom?

10 1. The area of a rectangle is 24 cm, and the length and width are all whole centimeters. How many kinds of rectangles are there?

102, rectangular iron sheet, 32 cm long, cut a square with a length of 4 cm at its four corners, then folded it up and welded it into a rectangular iron sheet box without a cover. It is known that the volume of this iron box is 768 cubic centimeters. What is the area of this iron?

103. Grade five students in bright primary school are divided into groups of 786, all of whom have just finished their studies. How many students are there in Grade Five?

104, Party A, Party B and Party C went to the library to borrow books. Party A comes every six days, Party B every eight days and Party C every nine days. If we meet in the library on March 5, when will we go to the library next time?

105. Gardeners planted a tree every 4 meters on both sides of a highway, and planted 74 trees in a row. Now it's time to plant a tree every 6 meters. So, how many trees don't need transplanting?

106, Zhang sold fruit all day. When counting money in the evening, he found that the stack of banknotes in his hand were all two yuan and five yuan. Zhang divided the pile of money into two piles with equal amounts. In the first pile, the amount of five yuan and two yuan is equal, and in the second pile, the number of five yuan and two yuan is equal. Do you know how much money there is at least in this pile of money?

107. How many square decimeters of iron does it take to process a cuboid tin oil drum with a length of 2.5 decimeters, a width of 1.6 decimeters and a height of 3 decimeters?

108, the school will dig a rectangular bunker, 4 meters long, 2 meters wide and 0.4 meters deep. How many cubic meters of yellow sand do I need to fill?

109. How many square decimeters of glass do you need to make a rectangular fish tank with a length of 8 decimeters, a width of 3 decimeters and a height of 5 decimeters?

1 10, forging a cubic billet with a length of 8 cm and growing a rectangular steel plate with a width of 5 cm. How thick is this steel plate? (excluding losses)

1 1 1, a cuboid oil drum, 8 decimeters long, 2 decimeters wide and 6 decimeters high. If each liter of oil weighs 0.72kg, how many kilograms of oil can it hold?

1 12. What are the surface areas of three cubes with 8 cm sides?

1 13. In a rectangular reservoir with a length of 20m, a width of 8m and a depth of1.5m, tiles are attached, with a side length of 0.2m..

1 14. The sum of all sides of the cube is 84 cm. How many cubic centimeters is its volume? How many square centimeters is the bottom area?

1 15. Make a rectangular iron drum (without cover) with a length and width of 5 mm and a height of 6dm. How many square decimetres of tin do you need at least?

1 16, rectangular glass fish tank, 6dm long, 4.5dm wide and 3.8dm high. What is the volume of the fish tank? The glass on its bottom and right side is broken. How many square decimetres of glass does it take to repair this fish tank?

1 17, a square with a side length of 8cm at the bottom, cut a section with a volume of 1.28dm3 from the square. How long should I cut it? (Equation solving)

1 18. Saw a piece of wood with a length of 3.6m and a width of 2.4m, and nailed it into a cubic wooden box with a side length of 3dm. How many pieces can I nail at most?

1 19, a room is 6 meters long, 3.5 meters wide and 3 meters high, with 8 square meters of doors and windows. Now, the walls and top of this room should be painted with cement. What is the area of cement painting? If you need 4 kilograms of cement per square meter, how many kilograms does a * * * need?

120. A cuboid medicine can hold 60 liters of medicine. It is known that the medicine pot is 5 centimetres long and 3 centimetres wide. What is its depth?

12 1, a cuboid with a total area of 64dm2. Find the cuboid volume (in dm).

122. The machinery factory produced 250 machine tools in early April, 150 machine tools in mid-April and 200 machine tools in late April. How many parts of the total number of machine tools were produced in the last 30 days?

123, the store has tons of grain to support the transportation and sale of tons in disaster areas. How many tons are left?

124. There are two ropes, the lengths of which are 28 decimeters and 35 decimeters respectively. Now cut them into equal pieces. What is the longest length of each work? A * *, how many pieces can you cut?

125, Wang Lin reads a book. On the first day, he finished reading the whole book. On the third and third days, he read the whole book more than on the first day. After three days, how many points are left?

126, Hongxing Furniture Factory plans to produce 300 sets of sofas in the first half of the year. /kloc-50 sets were produced in October, 30 sets in February and 55 sets in March. The rest will be completed in the next three months. How many sets will be produced on average every month?