First, find the total.

1, 28 butterflies flew away from the flowers and 9 flew away. How many flew away twice?

There are 39 horses in the racecourse, and 50 horses have come. How many horses are there in the racecourse now?

There are 40 trees on both sides of the road. A * * *, how many trees are planted?

Xiaoming planted five flowers, and Kobanawa Xiaohong and Xiaoming planted as many flowers. How many flowers did they grow?

5. There are 34 boys and 20 girls in Class 2 in one year. How many students are there in Class (2) in a year?

6. Mom wants to buy a dress. She brought 68 yuan, but she was missing 7 yuan. How much is this dress?

Second, find a lot.

1, Xiaodong has 15 storybooks, and Xiaodong has 8 storybooks less than Xiaolin. How many story books does Xiao Lin have?

2, a story book 8 yuan, the price of a dictionary is more expensive than a story book 5 yuan, how much is a dictionary?

3. There are 27 red flowers, and there are 8 more yellow flowers than red flowers. How many yellow flowers are there?

Xiaoming has 60 stamps, and Xiaodong has more stamps than Xiaoming 10. How many stamps does Xiaodong have?

5. One number is 70 and the other number is more than it 15. What is the other number?

6. Xiaohua made 20 envelopes, and Liang Xiao made 6 more than Xiaohua. How much did Liang Xiao do?

Third, find the partial number.

1, a book has 30 pages, Xiao Lin has read 9 pages, how many pages are left?

2. Leleyou 10 yuan bought an extra-curricular book, 7 yuan. How much did you get back?

3. There are *** 13 apples and pears, 4 apples and how many pears in Xiaohong's family?

There are 13 cars in the passenger station, and three cars have already left. How many cars are there?

There are 36 books on the shelf, some of which have been taken away. There are still nine books on the shelf. How many books have been taken away?

6. One group and two groups of students folded 58 paper cranes, of which the second group folded 30. How much is the discount for a group?

Fourth, find the decimal number.

1, one number is 60, and the other number is 20 less than it. What's the other number?

2. Xiaohong folded 50 flowers, Xiaoqing folded 20 less than Xiaohong, and Xiaoqing folded a few?

3. There are 30 cocks in the feeding group, 8 more than hens. How many hens are there?

How much is 4.8 smaller than 75?

5, a coat 80 yuan, a pair of pants is cheaper than a coat 20 yuan, how much is a pair of pants?

Fifth, find the difference.

1, Xiaoqing drew 17 florets twice, the first time she drew 9 florets, and the second time she drew a few fewer flowers than the first time.

2. The grey rabbit picked 17 pinecones, and the white rabbit picked 8 pinecones. How many pinecones did the grey rabbit pick more than the white rabbit?

Xiaoqing picked 13 boxes of strawberries in the morning and 8 boxes in the afternoon. How many more boxes did she pick in the morning than in the afternoon?

Xiaodong folded 30 red flowers, Xiaoqing folded 20, Xiaoqing folded as much as Xiaodong.

5. An extracurricular book has 50 pages, and Xiaohua has read 20 pages. How many pages have you read less than those you haven't read?