Tisch
1. Students must make 80 lanterns. Eight lanterns have been made. How much more do they have to do?
2.26 butterflies flew away from the flowers, and 15 flew away. How many flew away twice?
There were 15 planes at the airport, and three of them flew away. How many planes are there at the airport now?
Xiaoping planted 7 pots of safflower and the same amount of yellow flowers. How many pots of two kinds of flowers?
5. The school used to have 54 bottles of glue and bought back 19 bottles. How many bottles are there now?
6. Xiao Qiang has 19 apples and has eaten 13 apples. How many apples are there?
7. There are 73 cars in the passenger station, and 28 cars have already left. How many cars are there?
8. Children cut paper with 18 red paper and the same amount of yellow paper. How many sheets of paper did they use?
9. There are 29 horses in the racecourse, 15 horses. How many horses are there in the racecourse now?
10, the store has 15 fans, and 9 fans have been sold. How many fans are there now?
1 1. There are 60 orchids and chrysanthemums, 26 orchids and how many chrysanthemums in the school?
12, Xiaoqing drew 32 apples twice, 19 apples for the first time, and how many apples for the second time?
13. Xiaohong's family has ***3 1 apple, 24 apples, how many pears?
14. The school wants to send 42 boxes of stationery to the mountain primary school. Seven boxes have been delivered. How many more boxes do you want to send?
15. There are 1 1 cabbage at home. After eating five, how many more?
16. There are 48 trees on both sides of a road. A * *, how many trees have been planted?
17. Eight cars left in the parking lot, leaving 24 cars. How many cars are there in the parking lot?
18, 38 carts and the same number of cars were taken away from the parking lot. How many cars have been driven away twice?
19. There are 13 soccer balls in the school gymnasium, and 29 have been bought. How many are there now?
20. Learn from Lei Feng, and the regiment repaired 18 chairs in the morning and 19 chairs in the afternoon. How many chairs have been repaired in one day?
2 1, I calculated 100 math problems in the morning and 2 1 in the afternoon. How many more math problems did you work out in the morning than in the afternoon?
22. There are 72 female students and 0/8 male students in the library. How many boys are less than girls?
There are 20 big monkeys and 30 small monkeys in the zoo. How many little monkeys are there than big monkeys?
24. School football 10, basketball 16. How much less is football than basketball?
There are 40 pots of orchids and 60 pots of chrysanthemums in the garden. How many pots of orchids can be planted as many as chrysanthemums?
26. Mom bought 18 red buttons, 10 white buttons and 8 black buttons. (1) How many red buttons are there than white buttons? (2) How many black buttons are there than white buttons?
27. Xiaohua made 20 envelopes. Liang Xiao earned 6 pounds more than Xiaohua. How much did Liang Xiao do?
28. There are two bookshelves. There are 16 books on the first floor. There are eight books on the second floor. How many books are there on the second floor?
29. Mom bought 16 apples, and pears are 24 more than apples. How many pears did she buy?
30. There are 30 roosters in the feeding group, and there are 48 hens more than roosters. How many hens are there?
3 1, 84 people went for an outing in grade four, 8 people went for an outing in grade five, and how many people went for an outing in grade five?
32. The choir has 28 female students. There are four fewer boys than girls. How many male students are there?
33. Xiaohua has 32 white sheep, and the number of black sheep is less than that of white sheep 12. How many black sheep have you raised?
Students took part in labor and picked 40 baskets of cucumbers. White melons are picked less than cucumbers 18. How many baskets did you pick?
35. Xiaoming swatted the ball for the first time, 35 times, 7 times less than the first time. How many times was the second time?
36. Xiaoying has made 30 red stars, and 12 yellow stars are less than red stars. How many yellow stars did she make?
37. The school bought 37 boxes of white chalk and 8 boxes of colored chalk. How many boxes of chalk did it buy?
38. The school bought 45 boxes of white and colored chalk, including 8 boxes of colored chalk. How many boxes of white chalk?
39. The school bought 37 boxes of white chalk and 8 boxes of colored chalk. How many boxes of colored chalk are less than white chalk?
40. The school bought 8 boxes of colored chalk, and white chalk bought 29 boxes more than colored chalk. How many boxes of white chalk?
4 1, the school bought back 37 boxes of white chalk and 29 boxes of colored chalk. How many boxes of colored chalk did you buy back?
42. There are 35 litchi trees and 26 longan trees in the orchard.
(1) How many trees are there in a * *?
(2) How many longan trees are fewer than litchi trees?
Xiaoying made 42 red flowers, 34 yellow flowers and 15 white flowers.
(1) How much more red flowers are there than yellow flowers?
(2) How much less white flowers are than red flowers?
(3) How much less white flowers are than yellow flowers?
(4) How many flowers are there in a * * *?
Choose an appropriate question, draw a ""and work it out.
(1) The store sold 50 dolls twice and sold 30 dolls for the first time ...? (1) How much did you sell for the first time?
② How much is it sold for the second time?
(3) How many are sold twice?
(2) There are 60 chickens and 28 hens.
(1) How much is left?
② How many hens are fewer than chickens?
(3) a * * * how many?
45. Choose a suitable condition, draw "",and then work it out.
(1) There are 18 pots of chrysanthemums on campus ... How many pots are there fewer orchids than chrysanthemums?
① Carry away 16 pots; ② There are 5 pots left; ③ Orchids 16 pots.
(2) Kindergarten buys 50 apples ... How many pears are there?
① Assign 12 children;
② Pears are less than apples12;
③ There are more pears than apples 12.
46. Connect the appropriate conditions with the questions first, and then answer them.
(1) There were 30 grey rabbits and 24 white rabbits. How many people are there? How many gray rabbits are there?
(2) There were some rabbits, and four of them escaped. 18. How much is left?
extreme
1. Students line up to do exercises. There are four people in front of Xiaoming and four people behind him. How many people are there in this team?
2. A group of children play with eagles to catch chickens. One plays the eagle, one plays the hen and eight plays the chicken. Please come to three more groups. How many children are there in a group?
Xiaoming is 6 years old and Xiao Qiang is 4 years old. How old is Xiaoming two years later?
4. You line up with the children to do exercises. You are the sixth in the front and the fifth in the back. How many children are there in a * *?
Drivers line up to stop, counting from the front, Xiaoming's car ranks fourth, counting from the back, Xiaoming's car ranks fifth. How many cars are there on this line?
6. Teacher Feng said: Eight children have played hide-and-seek and have already caught four. How much is left?
7. Xiaohong took part in the math contest and shook hands with everyone who took part in the contest. Xiao Hongyi shook hands 39 times and asked how many people took part in the math contest.
8. There are 7 ducklings and 1 duck by the river. Four of them have crossed the river. How many ducklings are left?
9. On the bus, five people got on at the first stop, two people got off at the second stop and three people got on at the third stop. Q: How many people are left in the car? How many tickets did that aunt sell?
10. 12 Children line up for a spring outing. There are five students in front of Xiaoyun. How many students are there behind Xiaoyun?
1 1. A large class of children lined up to do gymnastics. There are 6 people on the left and 2 people on the right today. How many people are there in this row?
12. Xiaoping's home is 2 kilometers away from school. Once he walked 1 km to school, he remembered that he had forgotten to bring his pencil case, so he went home to get it. How many kilometers did he walk to school this time?
13. It takes a cat 1 minute to eat a fish. So, how many minutes does it take for 100 cats to eat 100 fish at the same time?
14. 13 children play the game of "the eagle catches the chicken". Five chickens were not caught. How many people were arrested?
15. 15 Children line up. There are 9 people on Xiaodong's left. How many people are there on Xiaodong's right?
16. 14 students stand in a team and do exercises. Zhang Bing is the sixth in front, which one is behind?
17. 13 chickens lined up, including a big cock. From the front, it ranks eighth. How many chickens are there in the back?
18. There are two baskets of apples, the first basket is 25 and the second basket is 19. How many apples are taken from the first basket and put into the second basket? How many apples are there in the two baskets?
19. After Xiaohua gave Xiao Fang eight stamps, they had the same number of stamps. How many stamps does Xiaohua have more than Xiao Fang?
20. Xiaoli has 18 pictures. After giving Xiaolong three pictures, the number of them is the same. How many pictures does Xiaolong have?
2 1. 13 children tug of war. How many children are there on one side and the other?
22. Xiaohua is 6 years old this year. Her father said to Xiaohua, "I will be 40 when you 10 are old." How old is dad this year?
23. Xiaoming's family eats four apples in the morning, noon and evening. How many apples did Xiao Ming's family eat a day?
It takes five minutes for five children to eat five apples at once. At this rate, how many minutes will it take for 10 children to eat 10 apples at the same time?
25. There is a little black sheep in the Little White Sheep Team. The little black sheep is the seventh in front and the fourth in the back. How many lambs are there in this team?
Qiang Qiang and Xiao Hua played table tennis for two hours. How many hours did each of them play?
27. Huahua's house has three floors above and two floors below. How many floors does this building have?
28. Xiaoming and his parents traveled to Beijing in the summer vacation. They took a group photo with everyone in the tour group and took 15 photos. How many people are there in the tour group?
29. When Xiaojun's family travels abroad, they need 10 yuan for a train ticket, and Xiaojun needs half a ticket. How much do they have to pay for the round trip?
30. Teacher Feng took the children to the aquarium and bought 20 tickets. How many children did Teacher Feng bring?
3 1. Xiao Liang walked into the classroom and saw that there were only eight students in the classroom. So how many students are there in the classroom now?
32. There is a piece of wood. If you saw once every 1 meter, it would take 1 minute for each saw, and ***6 minutes for the saw to be finished. How long is this piece of wood? (Assuming that the length of wood is an integer)
The acrobatic troupe has a dog, a rooster, a crab and a bear. How many legs do they have?
34. My sister is 8 years old and my father is 32 years old. How old is my father after four years?
35. When going to school in the morning, Xiaoping walked into the classroom and saw that eight students had come in the classroom. After a while, five more students came. How many students are there in the classroom now?
36. Small animals hold animal games. In the long-distance race, four animals run in front of the little squirrel and three animals run behind the little squirrel. How many animals take part in the long-distance race?
37. Children in Yixueyuan play Go. Today, they played a chess game with Tong Tong. It took 25 minutes. How long did it take each of them?
38. New Year's Day is Labor Day, Labor Day is Children's Day, and Children's Day is National Day. How long will it take to celebrate New Year's Day after National Day?
Tisso
1. After Xiaohua gave Xiao Fang eight stamps, they had the same number of stamps. How many stamps does Xiaohua have more than Xiao Fang?
Expert analysis: this problem is also a dark difference problem. Parents can guide their children to think in two ways. The first method: we can start with the number 1 and grasp the key words of the problem. Assuming that Xiaohua gave 1 to Xiao Fang, Xiaohua would have less 1 and Xiao Fang would have more 1, then the difference between two stamps would be 1+ 1=2 (sheets). And so on, 8+8= 16 (sheet) is the number of stamps that Xiaohua originally had more than Xiao Fang. The second method: hypothesis method. Grasping the keyword "as many", suppose that the number of stamps with the same number of two people is 8. Then, the number of stamps before Xiao Fang was 8-8=0 (sheet), while the number of stamps before Xiaohua was 8+8= 16 (sheet). In this case, it can be concluded that the original number of "Xiaohua" stamps is 16-0= 16 (pieces).
2. Dalin crosses 15 more than Xiaolin, Xiaoming crosses 6 more than Xiaolin, and Dalin crosses more than Xiaoming.
Expert analysis: there are two ways to think about this problem. Method 1: According to the meaning of the question, it can be concluded that Kobayashi is a relatively intermediate quantity. We can assume that Kobayashi did the 1 question, then Dalin did the 15 question more than he did, that is, Dalin did the 15+ 1= 16 (Dao) question, and similarly, Xiaoming did the 6+1. From this, we can get the question 16-7=9 (Tao), which is that Dalin has done more questions than Xiaoming. Method 2: Think of this problem as the relationship between inclusion and inclusion. Parents can draw simple icons to help their children understand. Similarly, Kobayashi is also an intermediate quantity. Kobayashi painted Dalin on the left and Xiaoming on the right. Then, Dalin has more 15 questions than Kobayashi, including 6 questions that Xiaoming did more than Kobayashi. Then using 15-6=9 (Tao) is not just that Dalin did 9 more questions than Xiaoming.
Xiaohua is 6 years old this year. Father said to Xiaohua, "When you are 10, I will be 40 years old." How old is dad this year?
Expert analysis: the key to this problem is to grasp a constant quantity, that is, the age gap between dad and Xiaohua will not change, which we can find with 40- 10=30 (years old). Then, knowing that Xiaohua is 6 years old this year, I asked my father this year's age, which is obtained by 6+30=36 (years old).
4. Thirty students signed up for interest groups. Among them, 26 people from the art group and 7 people from the calligraphy group/kloc-0 participated. How many people are there in both groups?
Expert analysis: This question examines the relationship between inclusion and inclusion. According to the conditions, it can be calculated that the total number of students participating in the art group and calligraphy group is 26+ 17=43 (people), which is 43-30= 13 (people) more than the total number of students participating in the interest group. This shows that the extra number must be the number of students who have participated in both the art group and the calligraphy group.
5. There are two baskets of apples, the first basket is 25 and the second basket is 19. How many apples are taken from the first basket and put in the second basket? The number of apples in the two baskets is equal?
Expert analysis: This problem is a typical dark difference problem. The key point of this problem is to grasp "as much as you pay", and at the same time, the number taken from the first basket is the same as the number added from the second basket. Then, first of all, we can calculate that the number of the first basket is 25- 19=6 (pieces) more than that of the second basket. Excluding these six apples, the number of apples left in the two baskets is equal, so we only need to divide the six apples into two equal parts, that is to say, take three apples from the 1 basket to the second basket, and the two baskets are the same. Parents are advised to start with small numbers in the guidance, help children start with teaching AIDS, sum up the rules and calculation methods, and then the problem of light and shade difference of large numbers will be solved.
6. Xiaoli has 18 pictures. After giving Xiaolong three pictures, the number of them is the same. How many pictures does Xiaolong have?
Expert analysis: This problem is also a dark one. According to the conditions, firstly, it can be concluded that the number of pictures of Xiaoli is 18-3= 15 (one) after Xiaoli gives Xiaolong three. 15 is the number of pictures after Xiaolong got three. Then, the question asked Xiaolong how many pictures he had. Grasping the word "original", you can get 15-3= 12 (Zhang).
7. Mom has to walk 3 kilometers from home to the factory. Once, she walked 2 kilometers to work, then went home to get a very important tool, and then went to the factory. How many kilometers did mom walk to work this time?
Expert analysis: Parents can help their children reproduce the scene and simulate the whole process with their children. At the same time, parents are required to draw line drawings and indicate numbers, both of which are indispensable. When children really understand the whole process, it will be very easy to answer this question. The correct answer to this question is 2+2+3=7 (km).