2. Xiaohu does a subtraction problem, and writes the six mistakes in the tenth place of the minuend as 9, the nine mistakes in the ninth place of the decimal as 6, and the final difference is 577. What is the correct answer to this question?
Students play the game of throwing sandbags. There are 140 sandbags in Class A and Class B. If Class A gives Class B five sandbags first and Class B gives Class A eight sandbags, then the number of sandbags in the two classes is equal. How many sandbags are there in two classes?
4. When a student does an addition problem, he regards 5 in the unit as 9 and 8 in one tenth as 3, and the result is 123. What is the correct answer?
5. When calculating the addition of two numbers, Xiaowen mistook 1 on one plus several digits as 7, and the other plus 8 on dozens of digits as 3, and the sum obtained was 1946. What is the correct answer to the original addition of two numbers?
6. Xiao Mahu did a subtraction problem, taking 6 in the decimal as 9 and 3 in the decimal as 5, and the result was 2 17. What is the correct answer?
7. Xiaojun was really careless when doing subtraction! Write 3 in the minuend unit as 8 and 0 in the tenth unit as 6, so that the difference he calculated is 199. What is the correct difference?
8. If a number is enlarged by 5 times, subtract 6 to get 39. If you subtract 6 from this number and expand it by 5 times, how much will you get?
9. Add 1 to a certain number, subtract 2, multiply 3, divide 4 to get 9, and find this number.
10, add 6 to a number, multiply 6, subtract 6, divide 6, and the result is equal to 6. Find a number.
1 1, an old man said: add my age to 17 and divide it by 4, then subtract 15 and multiply it by 10, which is exactly 100 years old. How old is this old man this year?
12. Cut off half of a rope by 0.4m, then cut off the remaining half, leaving 4.3m How long is this rope?
13. There is a wire. The first time I used it, half of it was less than 1 m, the second time I used it, the rest was more than 1 m, and finally there was 2.5 m left. How long is this wire?
14, there are 90 books in Group A, Group B and Group C. If Group B borrows 3 books from Group A and sends 5 books to Group C, the books in the three groups are just equal. How many original books are there in groups A, B and C?
15, there are two piles of balls, A and B, each with several balls. Move the balls according to the following requirements: first, take as many balls as those in pile A and put them in pile B; Then take out as many balls from pile B as pile A at this time and put them in pile A. At this time, the balls in piles A and B are exactly 16. Q: How many balls were there at the beginning of pile A and pile B?
16. There is a number. Divide by 5, multiply by 4, subtract 15, and add 35 to 100. What is the number?
17. Party A, Party B and Party C have RMB 168. For the first time, Party A gave as much money as Party B; The second time, B gave C as much money as C; The third time, C gave A as much money as A did at this time. At this time, A, B and C have exactly the same amount of money. How much is A more than B?
18 has three numbers, A, B and C. Take out 15 from A to B, 18 from B to C, and 12 from C to A. At this time, all three numbers are 180. What are the original numbers of a, b and c?
19. After subtracting 15, Grandpa Xiaoming's age this year is reduced by 4 times, and after subtracting 6, it is expanded by 10 times, which is exactly 100 years old. Please calculate, how old is Grandpa Xiaoming this year?
20. Someone went to the savings office to withdraw money. For the first time, he took out half of the deposit, 15 yuan, and for the second time, he took out the remaining half, 10 yuan. At this time, 125 yuan remains. How much money did he save?
2 1. The bookshelf is divided into upper, middle and lower floors. 192 This book is distributed in a * * *. Now take out as many books as the middle layer from the upper layer and put them in the middle layer, then take out as many books from the middle layer and put them in the lower layer, and finally take out as many books as the rest from the upper layer and put them in the upper layer. At this time, the number of books on the third floor is the same. How many books are there on the upper, middle and lower floors of this bookshelf?
22. There are several pencils, which are distributed to students A, B and C..a get the most, B gets the least, and C gets the least. After redistribution. In the first distribution, A gave B and C, and each gave B and C four sticks, and B got the most. In the second distribution, B gave A and C, A and C each gave four more, and C got the most. The third allocation will be given to Party A, Party B and Party C, and each person will be given four more pieces. After three redistributions, students A, B and C each got 44 pencils. How many pencils did students A, B and C get at first?
23. Arrange eight numbers from left to right, starting with the third number, and each number is exactly equal to the sum of the first two numbers. If the seventh and eighth numbers are 8 1 and 13 1 respectively, what is the first number?
24.2487 When subtracting a number, Xiao Ming mistakenly swapped the number on the reduced hundredth and tenth digits in the calculation, and the result was 8439. What is the correct result?
25. A group of monkeys share a pile of peaches. The first monkey took half and one, the second monkey took the remaining half and one, … until the seventh monkey took them all in the above way. How many peaches are there in this pile?
26 A rope was cut by 1m for the first time, by12 for the second time, by 1m for the third time, by 2/3 for the fourth time, by 1m for the fifth time and by 3/4 for the sixth time. At this time, 1m remains. This rope is already long.
There are 25 sparrows on two trees, five on the first tree and seven on the second tree. At this time, there are twice as many sparrows on the first tree as on the second tree. How many sparrows are there on each tree?
There are many plums in the bamboo basket. Give one half to the first person, two to the second person, and three to the third person. The plums in the basket have just finished eating. How many plums are there in the basket?
Mother bought a batch of oranges. Xiaoming ate more than half of these oranges on the first day, the remaining half was 1 on the second day, the remaining half was 1 on the third day, and Xiaoming ate the last orange on the fourth day. How many oranges did mom buy?
There is an orange tree on the top of the mountain, and a monkey is stealing oranges. I ate110 on the first day, and 1/9, 1/8, 1/7, ..., 1/3,1.
6. A bunch of watermelons sold 1/4 and 4 of the total for the first time, the remaining 1/2 and 2 for the second time, and the remaining 1/2 and 2 for the third time, leaving 2. How many watermelons are there in this pile?
7, a bottle of alcohol, pour out for the first time 1/3, and then pour back 40 grams in the bottle; Pour out 5/9 of the remaining alcohol in the bottle for the second time, and pour out180g for the third time, leaving 60g in the bottle. How many grams of alcohol were there in the original bottle?
8. Party A and Party B each have a few yuan. After Party A gives Party B 1/6, Party B gives Party A 1/5. At this time, they have their own 240 yuan. How much money did they have?
9. Grandpa Xiaohua went to the farmer's market to sell winter melon. The first time I sold half, the second time I sold the remaining half, and the third time I sold the remaining half, just sold out. How many wax gourd did Xiaohua's grandfather sell?
10, there are several small basketballs in the school. The sixth-grade students borrowed half of these balls and subtracted half. The fifth-grade students borrowed half and a half of the remaining balls, and the remaining half was lent to the fourth grade, which was just enough. How many little basketballs are there in the school?
1 1, five baskets of apples A, B, C, D and E, and the number of apples in each basket is different. If half of the apples in basket B are moved into basket A, 1/3 apples in basket C are moved into basket B, 1/4 apples in basket D are moved into basket C, 65,438 apples in basket E, and the last five baskets are all 30kg. How many kilograms does each basket of apples weigh?
12, build a section of road. On the first day, the whole road 1/2 was 2 kilometers longer. The next day, the remaining 1/2 was less 1 km, leaving 20 km unfinished. Find the total length of the highway?
13. Some people go from place A to place B, walking 40 kilometers more than 3/8 of the whole journey by train, and then walking 20 kilometers less than the rest distance of13 by car. Then I walked 30 kilometers more by boat than the remaining 4/5 of the second trip, and finally I walked 5 kilometers. How many kilometers is the distance between Party A and Party B?
14, Li Ming borrowed some books from the library and distributed them to the students in the group. He gave one to Wang Hong, the remaining 1/5 to Ma Hui, two to Zhang Li, the remaining 1/3 to Yang Liang, two to Wang Hong and the last two to himself. How many books did Li Ming borrow from the library?
1 and there is water in three containers. If 1/3 of water in container A is poured into container B, then 1/4 in container B is poured into container C, and finally110 in container C is poured into container A, so the water in each container is 9 liters. How many liters of water are there in each container?
At the end of last year, Party A, Party B and Party C got different bonuses. If Party A distributes part of its bonus to Party B and Party C, the bonus amount of Party B and Party C will be doubled. Then b takes out a part of the bonus and gives it to a and c, so that the bonus amount of a and c is doubled; Finally, C also gave a part of the bonus to Party A and Party B, so that the bonuses of Party A and Party B were doubled, so that the bonuses of all three people were 96 yuan. What should be the original bonus of Party A?
A boy paid a dime to enter a shop. He spent half of the money left in the shop and paid another dime when he left the shop. Later, he paid another dime to enter the second store, where he spent half of the remaining money and paid another dime when he left the store. Then he went in and out of the third and fourth stores in the same way. When he left the fourth shop, he had only a dime left. How much money did he have before he entered the first store?
4. Parts in three piles, A, B and C, are taken out of pile A for the first time and put into pile B and pile C, respectively, with 1/3 added, and taken out of pile B for the second time, with 1/3 added respectively. The third time, I got A and B from the third pile, and also added A and B 1/3 respectively, so that all three piles of parts were 320. How many original parts are there in Stack A?
The two brothers each have a few dollars. After my brother gave 1/5 to my brother, my brother gave 1/4 to my brother. At this point, each of them has 180 yuan. How much does my brother have? How much does my brother have?
6. There is a batch of chemical fertilizer in the warehouse. Half of it was used for the first time, half of it was left for the second time, half of it was left for the third time, and finally it was left for 0.5 tons. How many tons of chemical fertilizer are there in the warehouse?
7. The Young Pioneers in Binhai donated a batch of books to mountain schools hand in hand. Send this batch of books110 and 6 volumes to Qingshan primary school as planned; The rest is given to the Children's Palace, and 136 is given to the Children's Palace, which is three times more than that given to Qingshan Primary School. And the remaining 75% and 80 copies of the second time were given to Xiaomiao Kindergarten; Finally, there are 300 books left, which will be used as prizes in the mathematics competition of primary schools in mountainous areas. How many books did Binhai Young Pioneers donate?