Mother squirrel picks pine nuts. She can pick 20 pine nuts every day in sunny days, and can only pick 12 in rainy days. She has picked 1 12 pine nuts continuously, with an average of 14 per day. How many days are rainy?
There are many cows on the pasture. If the growth rate of forage grass is the same every day, these grasses can feed 10 cows for 22 days and 16 cows for 10 days. If 25 cows eat, how many days can they eat?
Xiao Li was calculating a division with a remainder, and misspelled the dividend 895 into 83 1, so that the quotient was 2 less than the original, but the remainder was exactly the same. The divisor of this problem is () and the remainder is ().
A bottle of oil even weighs 800g. If you eat half of the oil, weigh it together and there is 550g left. How many grams of oil are there in the bottle How much does this empty bottle weigh?
A, B, C and D took part in the school math contest at the same time. Before the competition, Party A, Party B and Party C predicted the results of the competition respectively. A said-row C 1, I ranked third, B said-row I 1, D ranked fourth, C said -D ranked second and I ranked third. After the results were announced, I found that each of them was only half right. Can you rank them?
The commodity number is a three-digit number. There are five three digits: 874,765,123,364,925. Every 1 bit has 1 bit, which is the same as the commodity number. The commodity number is ().
The decimal point of a number is shifted one place to the right, and the result is 23.04 more than the original number. What was the original number?
The decimal point of a number is moved one place to the right and then two places to the left, resulting in a decrease of 2.304 compared with the original number. What was the original number?
10 has a box of black and white pieces, and the number of sunspots is twice that of Bai Zi. If you take four sunspots and three Bai Zi at a time, there will be 16 sunspots after taking albino stars. How many black-and-white film?
1 1 When calculating the addition of two decimals, a careless classmate took the single digit 8 of one addend as 3 and the decimal digit 5 of the other addend as 8. So the calculated total is 15.7. What is the correct sum?
The whole class is sitting in chairs. If there are five people sitting on each bench, there will be no room for the other three. If there are 7 people on each bench, there will be 13 seats. Ask the number of people in this class.
13, 3 pears =4 peaches.
3 apples =5 peaches.
1 apple 1 pear =? How many peaches are there on the right side of the balance? )
14 Please change the position of the two numbers on the left of the equal sign to make both sides of the equal sign equal.
0.4×0.6+0.5×0.9+0. 18+0.3-0.2×0.7= 1
I have 1969 yuan. I am richer than you.
B: Move my money one place to the right, and it will wait for your money.
How much money does Party A and Party B have?
/kloc-57 students in class 0/5. In one exam, there were 28 students in English, 32 students in Chinese and 36 students in mathematics, including 52 students (including 300 students). 300% how many people asked 16. A book was torn in the middle, and the sum of the remaining pages was exactly 165438+. 17 fourth-grade students go on a trip. If there are 25 people in each car, one car is missing. If there are 30 people in each car, there is one more car. So, how many students in the fourth grade took part in the math contest of 18? There are forty students in Class One and fifty students in Class Two in Grade Four. The registration fee of Class One is less than that of Class Two, 40 yuan. How much is the registration fee for each person in Class Two? 19 A farmer keeps 16 rabbits in a room, 8 cages, 4 walls, 3 in each cage, 2 in each cage and 6 in each wall. The release method is as follows:
2 2 2
2 2
2 2 2
One day, the farmer bought 1 rabbit. To put it in a cage, there are still 6 rabbits in each wall cage. How to put it? If farmers buy back two, three and four, how can they be released? In order to take part in the math competition, there are 40 students in Class One and 50 students in Class Two, Grade Four. The registration fee of Class One is less than that of Class Two, 40 yuan. How much is the registration fee for each person in Class Two? 2 1 took part in the math contest. There are 40 students in Class One and 50 students in Class Two in Grade Four. The registration fee of Class One is less than that of Class Two, 40 yuan. How much is the registration fee for each person in Class Two? ***0 comments ... 22 Before doing this problem, look at a thinking question in Grade Three, "Fill the four numbers 1, 3,5,7 in () and write it as a multiplication formula". A batch of oranges is distributed equally to boys and girls, and each person can get three oranges. If you only give it to boys, everyone can get four oranges. If you only give it to girls, everyone can get () oranges.
This oil company has two oil depots, AB. Warehouse A has 180 tons of gasoline, and warehouse B has 120 tons of gasoline. Now the oil company wants to transport gasoline to two gas stations, namely 50 yuan, 40 yuan, 30 yuan and 60 yuan. It is known that station A needs oil.
) freight.
25. In the array (1, 1,1) (2,3,4) (3,5,9) ..., the sum of the three numbers in the 40th group is ().
In a math exam, the average score of students A, B and C is 95, while the average score of students B, C and D is 97. It is known that A got 92 points and D got (
) points.
26, 40 people want to cross a big river, there is only one rubber boat, and at most 7 people can get together at a time. As we all know, it takes 5 minutes to cross the river by rubber boat once, while it takes them () minutes to cross the river once.
Three years ago, the total age of three students and teachers was exactly 90 years old. This year, the total age of the three students is exactly equal to the age of the teacher. Three years later, the teacher will be () years old.
28, there are seven riddles for 57 people to guess, * * * only 237 people, it is known that no one guessed wrong, 2 people guessed 1, 6 people guessed 2, 16 people guessed 3, 8 people guessed 5, as many people guessed 4 and 6, 7 people guessed 7 (
) people.
29. Mr. Wang's telephone number is seven digits. Add the first four digits to the last three digits to get 9424, and add the first three digits to the last four digits to get 450 1. Mr. Wang's telephone number is (
)。
30. There are six barrels of oil, weighing 17, 18, 19, 2 1, 22 and 32 kg respectively. I don't know what oil is in each barrel, but I know that the total weight of engine oil is twice that of diesel. 17.
) oil, () oil, () oil.
3 1, Xiaohong goes from A to B, and it takes 42 minutes to walk back and forth. When she goes, it takes 33 minutes to walk back by bike, and it takes (
) minutes.
32. A bus and a truck leave from Party A and Party B at the same time. The bus travels 75 kilometers per hour and the truck travels 65 kilometers per hour. The two cars met at a distance of 25 kilometers from the midpoint. The distance between Party A and Party B is (
) kilometers.
33. Three trucks transport a total of 169 tons of coal, of which car A transports 12 tons less than car B, car C transports 7 tons more than car A, and car A transports () tons.
34. A five-digit number was written on the teacher's card. When Xiao Ming got it, it was still a five-digit number, but it was 258 12 1 less than the original five-digit number. The original five digits are (
)。
35. There are eight numbers in a row, the average of the first six numbers is 96, the average of the last three numbers is 84, and the sixth number is ().
36. At midnight, between 12: 00 and noon 12: 00, the minute hand on the clock face is at right angles to the hour hand ().
37. A classmate in an office bought the book Grimm's Fairy Tales. Interestingly, the number of people who bought this book is exactly the same as the number of yuan in this book. More interestingly, the number of yuan in the unit price of this book is equal to the sum of the digits of the total yuan payable by these students. It is known that the number of people who buy books is odd, and each Grimm's Fairy Tales (
) yuan.
38, machinery factory processing a batch of parts, the original plan to process 80 per hour, the actual processing of 20 per hour than the original plan, the result is completed five hours ahead of schedule. This batch of parts * * (
) one.
39. Five identical rectangles are put together to form a big rectangle. It is known that the circumference of a small rectangle is 12cm 40. The transportation company transports 1500 sets of glass tea sets for a factory, and the freight for each set is 2 yuan. For each damaged set, there is not only no freight, but also the compensation fee 78 yuan is deducted from the freight. As a result, the transportation company actually paid 2440 yuan. * * * Damage during transportation (
) A tea set.
4 1, chicken and rabbit *** 100, chicken has 2 14 more legs than rabbit, chicken () and rabbit (). 4 1. A workshop wants to produce 1560 TV sets. It has been produced for 8 days, and 120 TV sets are produced every day. The remaining 150 TV sets are produced every day. How many days will it take to complete this task?
42. A clothing workshop used to make a set of 48 decimeters of clothing cloth, but with the new method of cutting, each set can save 3 decimeters of cloth. Originally planned to make 3000 sets of clothing fabrics, how many sets can you make now?
43. A chicken farm shipped 1 month 13600 broilers, which was twice as much in February, and 800 fewer in March than in the previous two months. How many broilers were shipped in March?
44. It is planned to produce a batch of parts. Master Wang produces 90 pieces every day, which takes 12 days to complete. Results 18 was produced more than originally planned every day, which could be completed several days in advance.
45. Four baskets of tomatoes weigh 80kg and five baskets of vegetables weigh * * * 125kg. How many kilograms is a basket of vegetables heavier than tomatoes on average?
46. The canteen delivered coal 1200 kg, and burned it 16 days, leaving 480 kg. How many kilograms does it burn on average every day?
47. 430 students from Xincun Primary School took five buses to visit the countryside. The first four carriages each carry 84 people. How many people does the fifth car need to take to ensure that all of them get on?
48. The school library bought *** 1020 storybooks, including 850 storybooks. How many story books are there than science books? How many times are story books more than science books?
49. Honghua Garment Factory made a batch of school uniforms, 12 days, with an average of 1450 per day. There is still a gap of 109 pieces. A * *, how many pieces to make?
50. A professional poultry farmer raised 890 ducks, and the number of chickens was three times less than that of ducks. 15. So, how many ducks and chickens does this poultry professional keep? Tired, must accept.