(1) The weight of Xiao Dong and Xiao Jun is 32× 2 = 64 kg.
The weight of Obana Xiaojun is: 28× 2 = 56 kg.
The weight of Xiaodong and Xiaohua is 30× 2 = 60 kg.
The weights of Xiaodong, Xiaojun and Xiaohua are: (64+56+60) ÷ 2 = 90kg.
The average weight of these three students is: 90 ÷ 3 = 30 kg.
(2) Xiao Dong's weight: 90-56 = 34kg.
Small unit weight: 90-60 = 30 kg
Small flower weight: 90-64 = 26kg.
123456789 Nine numbers, one number in each bracket makes the formula valid (each number cannot be reused).
The first question:
( )( )+( )-( )=( )
( )*( )=( )( )
The second question:
( )( )( )( )*( )=( )( )( )( )
The first question: (1) (3)+(2)-(7) = (8)
⑹*⑼=⑸⑷
Question 2: (1) (7) (3) (8) * (4) = (6) (3) (6)
Or: (1) (9) (3) * (4) = (8) (5) (2)
Wang Ran runs along a 60-meter-long rectangle for 6 minutes, running 120 meters per minute to find the width.
A * * * ran away:
120 * 60 = 720m
720\60= 12 (m) 1。 The school bought five boxes of badminton, each box 12. I spent 20, how many are left? 2. The school bought three basketballs and * * * spent 96 yuan; I bought another football and spent 40 yuan. How much does it cost to buy a basketball and a football? What is the difference in unit price between the two kinds of balls? Wang Xia bought a story book with 140 pages and has read 86 pages. The rest of the plan will be completed in six days. How many pages do you need to read every day? The price of chairs is 25 yuan, and the price of tables is three times that of chairs. How much does it cost to buy a chair and a table? There are 58 story books and 34 popular science books in the library corner of the class. How many books do you want to put on a four-story bookshelf? Lily and Wang Min made paper cranes at the same time. Lily does 12 cranes every hour, and Wang Min does 14 cranes every three hours. How many paper cranes did two people make together? 7. Students participate in the mountain climbing competition, and the Lala credits are divided into 4 groups, each group has 15 people. There are 76 boys taking part in the competition. How many students took part in the mountain climbing competition? 8. Uncle Wang went into the county and sold 9 rabbits, each 22 yuan. Also sell 1 sheep, get 160 yuan. (1) How much did Uncle Wang spend on his rabbit and sheep? (2) Wang bought four bottles of pesticides with the money from selling rabbits and sheep, each bottle was 13 yuan. How much money does Uncle Wang have left? 9. Which is cheaper, a barrel of 3 kg oil in 42 yuan or a barrel of 5 kg oil in 65 yuan? 10, a coat 65 yuan, a pair of pants 28 yuan. (1) How much is it more expensive to buy four coats than four pairs of trousers? (2)1Is it enough for 50 yuan to buy two sets of clothes? 1 1. There are two iron wires, the first one is 35 meters long, and the second one is 4 times 2 meters longer than the first one. How long is the second one? 12. The circumference of the rectangular playground is 400 meters, and the length is three times the width. What is the length and width of this playground? 13, with two identical rectangles, 8 decimeters long and 4 decimeters wide. If you put them together into a rectangle, what is the circumference of the rectangle? What is the circumference of a square if it is spelled into a square? 14, Dongdong borrowed a 40-page science and technology book and returned it a week later. He intends to read six pages every day. Can he return it on time? /kloc-Class 0/5 and Class 3 (2) have 44 people in total. The teacher is going to divide them into eight groups for discussion. How many people are left in each group? 16, a piece of 4-meter-long cloth can be cut into five vests of the same size. How much cloth does it take to make a vest? 17. A baby elephant weighs 4 tons. How many elephants can a large truck with a load 10 ton transport at a time? 18, 632 bags of dry bottles in Hongqi chain store, 385 bags were sold and 200 bags were shipped. How many bags of dry bottles are there in the shop at this time? 19, the school bought 8 10 exercise books, and took them from the first grade 168, and from the second grade 165. How many books are left? 20. The car 10 of a certain train originally had 1 16 people. After arriving at a station, 58 people got off and 45 people got on. How many people were there in this car when we drove again? 2 1, 238 yuan for a VCD and 458 yuan for a scanner. Dad brought 800 yuan. Is it enough? 22. Uncle Zhang caught 700 Jin of fish, sold 523 Jin in the morning, and sold 394 Jin less in the afternoon than in the morning. (1) How many Jin did you sell this afternoon? (2) How many kilograms did a * * * sell on this day? (3) How many kilograms are left? 23. Xiaoming and his sister go to the bookstore together. My sister bought an English dictionary in 87 yuan, and Xiaoming bought a science book in 24 yuan. My sister paid the cashier 150 yuan. How much should I get back? 24. Make a picture frame for a picture 30 cm long and 26 cm wide. What is the circumference of the photo frame at least? 25. Make a big rectangle with two rectangles 4 cm long and 3 cm wide. What is the circumference of a big rectangle? 26. The playground of Xiangyang Primary School is rectangular, with a length of100m and a width of 65m. Xiao Qiang ran around the playground twice. How many meters did Xiao Qiang run? 27. There are 3 students1person and 2 teachers. Each ship is limited to four people. How many boats should I rent at least? 28. A pair of China chess 16 yuan, a pair of checkers 12 yuan, and a pair of Go is three times the sum of a pair of China chess and a pair of checkers. Xiao Ming takes 80 yuan, is it enough to buy a pair of Go? The students proposed to donate 400 books to the Hand in Hand school. 58 books were donated from grade one to grade six. How many books do I have to donate to reach 400? 30. Plant trees in spring. Plant 12 in the fifth grade and 16 in the sixth grade. The number of trees planted in the whole school is three times that of the fifth and sixth grades. How many trees have been planted in the whole school? 3 1, there are 30 students, 15 came. There are five students in a row. How many rows can they line up? 32. Make a square with a 36 cm iron wire. How long are the sides of this square? 33. If a rope is 25 meters long, cut off 10 meter first, and make a short jump rope every two meters for the rest. How many short jump ropes can you make? How many meters are left? 34. Cut a rectangular piece of paper with a length of 36 cm and a width of 18 cm into two largest squares. What is the circumference of a square? 35. A rope is five times that of 45 meters, and a wire is seven times that of this rope. How long is this wire? 36. To build a 945-meter road, 354 meters were built in the first month, 276 meters in the second month, and how many meters will it take in the third month? 37. The supermarket sold 153kg of rice in the morning, and there were 56 more bags in the afternoon than in the morning. How many bags of rice did the worker sell today? The fruit shop returned 54 baskets of fruit, 48 of which were apples and the rest were pears. How many times are there apples and pears in these baskets? 39. A car travels 55 kilometers per hour. According to this calculation, how many kilometers can you drive in 4 hours? 40. The feeding group raised 32 white rabbits and 26 black rabbits. The number of grey rabbits is less than the total number of white rabbits 18. How many gray rabbits will you raise? 4 1, the road repair team built a road, which has been repaired for 550 meters, and the rest is four times as much as it was repaired. How many meters are left? How long is this road? 42. Mingming has 42 petrol tickets, Fangfang has more than Mingming 14. How many stamps do they have? There are 24 Metasequoia glyptostroboides in the campus, and the number of pine trees is three times that of Metasequoia glyptostroboides. How many Metasequoias and pine trees are there? How many Metasequoia trees are fewer than pine trees? There are 35 black swans, and the number of white swans is three times that of black swans, with eight more. How many white swans are there? 45. Aunt Wang went to buy three footballs, each 28 yuan, and paid the salesperson 100 yuan. How much did she get back? 46. The rectangular playground is 55 meters long and 35 meters wide. Xiaohua ran two full laps along the playground. How many meters did he run? 47. Class Three (1) borrowed 29 books, Class Three (2) borrowed 38 books and Class Three (3) borrowed 34 books, less than the sum of Class One and Class Two. How many books did Class Three (3) borrow? 48. The fruit shop sent 850 Jin of apples, and sold 286 Jin in the morning and 354 Jin in the afternoon. How many kilograms are left? 49. A rope is 25 meters long. Cut 10 meter first, and make a short skipping rope every two meters for the rest. How many short jump ropes can you make? How many meters are left? 50. Xiaohong, Xiaoying, Xiaolan and Xiaoping have a table tennis match. Every two people play once, how many times will a * * * play? Please write them down. 5 1, the fruit shop returned 650 kg of apples, sold 385 kg, and some returned 270 kg. How many kilograms of apples are there in the fruit shop now? 52. The third-grade students of Hongxing Primary School go for a spring outing in four cars. The first three carriages each carry 68 students, and the fourth carriage carries 74 people. How many people went for a spring outing? 53. An article is 600 words. Xiao Fang's father can type 67 words per minute on average. Can he finish it in 9 minutes? 54. The road repair team has built a road with a length of 1 1,500m, which has been repaired for 500m, and the remaining six days will be completed. How many meters do you need to repair every day on average? 55. The track of the sports ground is 400 meters. Uncle Wang insists on running two and a half laps every day. How many meters does he run every day? 56. Xiaoli walks for about 50 cents. She walked 540 steps from home to school. Calculate, how many meters is it from her home to school? 57. The light blue height 134 cm, and the east thing is 5 cm higher than the light blue. How many centimeters is Dongdong tall? 58. There are 257 boys and 235 girls in the third grade of Red Scarf Primary School. There are 387 people who have undergone physical examination. How many people don't? 59. The library has lent out 456 books, and there are 207 books left. Now, 285 books have been returned. How many books are there in the library now? 60. The Red Scarf Primary School bought 380 balls and 70 soccer balls, and borrowed 423 balls during extracurricular activities. How many balls are left in the school now? 6 1. Class 3 (2) donated 400 books, with 273 books left. Now we have bought 125 books. How many books are there in Class Three (2)? 62. Dongdong wants to buy a 3 10 yuan scooter, which has been deposited in 200 yuan. If he deposits in 30 yuan every month, a few more months will be enough. 63. The students of Dongfanghong Primary School donated 900 books to Project Hope, including 326 story books, 475 science books and the rest comic books. How many comic books are there? 64. The side length of a square is 8 cm. If its side length increases by10cm, how many centimeters will its perimeter increase? 65. Xiaoming is 2000 meters away from school and Xiaohong is 1500 meters away from school. What is the farthest distance between them? What's the nearest distance? How many 20-cent and 50-cent stamps can I buy for 66.50 yuan? 67. A silkworm needs 600 kilograms of mulberry leaves and can produce 50 kilograms of cocoons. How many kilograms of mulberry leaves does Xiaoli need to raise four silkworms? How many kilograms of cocoons can you cocoon? 68. The baby elephant weighs 100 kg at birth, increasing by 200 kg every year. /kloc-How much will it weigh in 0/0 years? 69. Uncle Wang sends 25 barrels of water every day, each of which is 25 kilograms. How many kilograms of water does Uncle Wang send every day? 70. The Olympic torch travels 8 16 kilometers in a certain place in four days. How many kilometers do you pass on average every day? 7 1. Xiaoming and Xiaohong collect stamps. Xiao Ming has 15 more stamps than Xiao Hong, which is exactly four times that of Xiao Hong. How many stamps do Xiaoming and Xiaohong have? The school bought five boxes of badminton, each box 12. I spent 20, how many are left? 72. The school bought three basketballs and * * * spent 96 yuan; I bought another football and spent 40 yuan. How much does it cost to buy a basketball and a football? What is the difference in unit price between the two kinds of balls? 73. Wang Xia bought a story book with 140 pages and has read 86 pages. The rest of the plan will be completed in six days. How many pages do you need to read every day? 74. The price of chairs is 25 yuan, and the price of tables is three times that of chairs. How much does it cost to buy a chair and a table? There are 58 story books and 34 popular science books in the library corner of the class. How many books do you want to put on a four-story bookshelf? 76. Lily and Wang Min made paper cranes at the same time. Lily makes 12 cranes every hour, and Wang Min makes 14 cranes every hour. It took three hours. How many paper cranes did two people make together? 77. Students participate in the mountain climbing competition, and the Lala credits are divided into four groups, each with 15 people. There are 76 boys taking part in the competition. How many students took part in the mountain climbing competition? 78. Uncle Wang entered the county seat and sold nine rabbits, each 22 yuan. Also sell 1 sheep, get 160 yuan. (1) How much did Uncle Wang spend on his rabbit and sheep? (2) Wang bought four bottles of pesticides with the money from selling rabbits and sheep, each bottle was 13 yuan. How much money does Uncle Wang have left? 79, a barrel of 3Kg oil 42 yuan, a barrel of 5Kg oil 65 yuan, which bottled oil is cheaper? 80, a coat 65 yuan, a pair of pants 28 yuan. (1) How much is it more expensive to buy four coats than four pairs of trousers? (2)1Is it enough for 50 yuan to buy two sets of clothes? 8 1, there are two iron wires, the first one is 35 meters long, and the second one is 4 times 2 meters longer than the first one. How long is the second one? 82. The circumference of a rectangular playground is 400 meters, and its length is three times its width. What is the length and width of this playground? 83. There are two identical rectangles with a length of 8 decimeters and a width of 4 decimeters. If you put them together into a rectangle, what is the circumference of the rectangle? What is the circumference of a square if it is spelled into a square? 84. Dongdong borrowed a 40-page science and technology book and returned it a week later. He intends to read six pages every day. Can he return it on time? There are 44 students in Class Three (2). The teacher is going to divide them into eight groups for discussion. How many people can each group have? How many people are left? 86. A piece of 4-meter-long cloth can cut five vests of the same size. How much cloth does it take to make a vest? 87. A baby elephant weighs 4 tons. How many elephants can a large truck with a load 10 ton carry at a time? 88. Hongqi Chain Store has 632 bags of dry bottles, of which 385 bags were sold and 200 bags were shipped. How many bags of dry bottles are there in the shop at this time? 89. The school bought an exercise book of 8 10, and took it away from the first grade 168 and the second grade 165. How many books are left? 90. Car 10 of a certain train originally had 1 16 people. After arriving at a station, 58 people got off and 45 people got on. How many people were there in this car when we drove again? 9 1, 238 yuan for a VCD and 458 yuan for a scanner. Dad brought 800 yuan. Is it enough? 92. Uncle Zhang caught 700 Jin of fish and sold 523 Jin in the morning. I sold 394 Jin less in the afternoon than in the morning. The highest bit of 285 1. 5480 is (), pronounced (). 2. Use 3, 0, 7 and 4 to form a four-digit number, the smallest is () and the largest is (). 3. In the formula □6÷8, make the quotient two digits, and at least □ fill in (). To make the quotient a single digit, fill in () at most. 4.76 is more than ()18; The () times of 5 is 65. 5. Fill in the appropriate units in (). A watermelon weighs 4 () and a coin weighs 1 cent. 4 () Xiao Ming is 1 15 () Xiao Yong runs 50 and Mi Yue needs 10() 6. It is known that △+○ =□, if △+○+□ = 60, then □ = (). 7. 1:30 in the afternoon, 9: 00 in the morning10, and 8:00 in the evening, respectively. 8. The circumference of a square with a side length of 6 cm is () cm. If the circumference of another rectangle with a length of 8 cm is equal to the circumference of this square, then the width of this rectangle is () cm. 9. Put four red balls and 1 white balls in a cloth bag, then touch one ball at a time and do it 20 times. () The colored ball may be touched more times, () The colored ball may be touched less times. /kloc-read a book in 0/0.6 days, and read () and () days on average every day. Second, carefully scrutinize and make judgments. (Put "√" in brackets after the question and "×" for the wrong question) (1 for each question, 6 points are counted)1. Counting, ten, hundred, thousand, ten thousand ... are all numbers. () 2. The product of three digits and 8 must be four digits. () 3. A quadrilateral whose four corners are right angles is called a square. () 4. Looking at an object from above, there is only one shape. () 5. Divide a piece of paper into 7 parts, and 4 parts belong to this paper. () 6. In division with remainder, the divisor is less than the remainder. () Third, compare repeatedly and choose carefully. (Fill in the serial number of the correct answer under the question in brackets) (6 points for each question 1) 1. () ÷ () = 3 ...2. If the divisor is a number, there are () ways to fill in the equation. 142536472. The number consisting of three tens, five hundreds and four ones is (). 1 534 2 345 3 354 4 435 3. In the addition formula, one addend increases by 5, and the other addend also increases by 5, and their sum (). ① Decrease 5 ② Decrease 65 438+00 ③ Increase 65 438+00 ④ Increase 54. A train leaves from Station A at 8:00 a.m. and arrives in bilibili at 15:20. The train leaves at (). ①7 hours and 20 minutes ②7:20 ③5 hours and 20 minutes ④5:20⑤. Make a rectangle with at least () sticks. 14263104126. A large watermelon is divided into 8 pieces on average, and 3 pieces are eaten, leaving the watermelon (). 1, 2, 3, 4, meticulous and careful. (12+ 15+9 = 36 points) 1. (65,438+0,65,438+02) 55+37 80-26 65,438+0400-800 62-39 2× 265,438+00 9× 300 82 ÷ 2 36 ÷ 3-+. (3 points for each question, 15 points) 84 ÷ 6 70 ÷ 7119× 5 703× 6 560× 7 3. Recursive equation calculation. (3 points for each question, 9 points) 78 ÷ 3 ÷ 2 123 × 9+4 2 × 438 × 6 5. Draw together and think together. (5 points) There are two rectangles, both 4 cm long and 2 cm wide. What numbers can you spell? Please draw and find out the circumference of the puzzle. Six, live learning and use, solve problems. (5 points for each question, 25 points) 1. I hope that primary schools will organize students to visit patriotic education bases. In the morning, I went to three groups of students, each with 169 students, and in the afternoon, I went to 2 13 students. How many students visited today? 2. A sweater 120 yuan, the price of a coat is four times that of a sweater. How much does it cost to buy seven such coats? 3. At 9: 00 on June 10, 2005, the Long March II rocket carrying the Shenzhou VI spacecraft was ignited and lifted off. 13 minutes later, the rocket has flown through the stratosphere and middle layer and is approaching the edge of the atmosphere. After another 8 minutes, the spacecraft entered the scheduled orbit normally, and after another 18 minutes, the commander-in-chief announced that the Shenzhou VI manned spacecraft was successfully launched. Think about it, calculate, when the manned spacecraft was successfully launched, what time did the clock show at 9: 00? 4. How much is used to make pants and tops with a piece of cloth? How much cloth is left is useless? A wire is 34 meters long. If you enclose it in a rectangle with a length of 12 m and a width of 6 m, is this line long enough? (Answer after calculation)