1. The school has 16 pots of orchids and chrysanthemums, 6 pots of orchids and several pots of chrysanthemums.

2. Xiaoqing drew nine pictures twice, five for the first time, and how many for the second time?

3. There are 18 apples and pears, 9 apples and how many pears in Xiaohong's family?

4. The school wants to send 20 boxes of stationery to primary schools in mountainous areas, and has already sent 10 boxes. How many more boxes do you want to send?

5. There are 15 cabbages at home. I ate five cabbages. How many more?

6. There are 9 trees on both sides of a road. A * *, how many trees have been planted?

7. Nine cars were taken from the parking lot, and there were five left. How many cars are there in the parking lot?

8. Eight big cars and the same number of cars were taken away from the parking lot. How many cars have been driven away twice?

9. There are eight footballs in the school gymnasium, and seven have been bought. How many are there now?

10, learning from lei feng, the group repaired 8 chairs in the morning and 12 in the afternoon. How many chairs were repaired in one day?

1 1. Xiaoming and Xiaoli took 35 photos, Xiaoli took 20 photos, and how many photos did Xiaoming take?

12. There are 20 birds in the tree. First, seven birds flew away, and then six birds flew away. How many birds have flown away?

13. Blue flowers: 20 pots of safflower: 45 pots of yellow flowers: 8 pots.

(1) How many pots of safflower and yellow flower are there?

(2) How many pots of blue flowers are there than yellow flowers?

(3) How many pots of blue flowers will be as many as red flowers?

(4) What other math questions can you ask? Write it out and calculate it in columns.

14. Globe: 32 yuan Coat: 47 yuan Book: 8 yuan

(1) How to pay for a coat?

(2) How much does it cost to buy a coat and a book?

(3) What can money buy in 50 yuan? How much is left?

15. Donate books to Hope Primary School.

Class one, class two and class three.

32 storybooks, 27 storybooks, 19 storybooks.

Composition 16 23 44.

(1) How many story books are there in Class One and Class Two?

(2) How many story books are there in Class Three than composition books?

(3) How many composition books are there in Class One than story books?

(4) What other math questions can you ask?