1. (Warm Up)Oral calculation.
2 + 4
8 - 1
1 + 6
7 - 5
5 + 2

3. 10-game

4. please find the missing numbers.
All of the answers are 10,
please find the missing numbers.

5. ○○○○○
5+□=10

6. Colour the circles with blue and red .
○○○○○
5+□=10 5

7. ○○○○○
□+1=10

8. Colour the balls with blue and red .
○○○○○
□+1=10 9
1+ 9=10

9. please find the missing numbers.
All of the answers are 10,
please find the missing numbers.
Are there any other addition number sentences with the result “10”? 5 9 8 6 4 3 1 7 10 2

10. 1+9=10 1+9=10 9+1=10 2+8=10 2+8=10 8+2=10 3+7=10 3+7=10 7+3=10 4+6=10
Friends make 10
1+9=10
1+9=10
9+1=10
1 and 9,hand in hand;
2 and 8,walk together;
2+8=10
2+8=10
8+2=10
3 and 7,back to back;
3+7=10
3+7=10
7+3=10
4 and 6,head to head;
4+6=10
4+6=10
6+4=10
5 and 5,wave wave wave.
5+5=10
5+5=10
Change the positions of two addends,
sum remains unchanged.

11. Exercise 1
Please select two numbers from 1, 2, 3, 4, 5, 6, 7, 8, 9, to add , and the answer is 10.
□+□= □+□=10 3 7 7 3

12. At the beginning, there are 10 bottles of juice, but now only 8 bottles left. How many empty bottles?
10- □ =8

13. 10- □ =8 2
2+8=10
We can use addition to solve problems of subtraction.
10- □ =6 4
4+6=10

14. Exercise 2
Fill in the blanks
5 + □ = － □ = 5
7+ □ = － □ =7
□ +6= －□ =6
□ + □ = －□ = □ 5 5 3 3 4 4

15. Can you write down two more number sentences by this picture?
○○○○○
9+1=10
10-1=9
1+9=10
10-9=1

16. □+□=10 □+□=10 10-□=□ 10-□=□ Exercise 3 3 7 7 3 3 7 7 3
Please select two numbers from 1, 2, 3, 4, 5, 6, 7, 8, 9, to compose four number sentences.
□+□= □+□=10 3 7 7 3
10-□=□ □=□ 3 7 7 3

17. Alex， Emma and Poppy， each one had 10 balls and wanted to throw balls into the barrel, let's have a look, who did best?
Emma
Alex
Poppy

18. Emma
Alex
Poppy
Balls in all = Balls outside + Balls inside
10 = 2 + □ 8
10 = 3 + □ 7
10 = 4 + □ 6
An addend add 1,another addend minus 1,Sum keeps unchanged.

19. Alex
Emma
Poppy
Alex did best.

20. Shopping Activities Rubber glue scissors ruler
￡ ￡ ￡ ￡ 4
pencil pencil box crayon
￡ ￡ ￡ 10

21. I want to buy:
Number sentence:
rubber
pencil case
1+9=10

22. Today we played 10-game.
Do you have a good time?