凑十法和破十法练习

9 + 9 = 9 + 8 = 9 + 7 =

9 + 6 = 9 + 5 = 9 + 4 =

9 + 3 = 9 + 2 = 8 + 9 =

8 + 8 = 8 + 7 = 8 + 6 =

8 + 5 = 8 + 4 = 8 + 3 =

7 + 9 = 7 + 8 = 7 + 7 =

7 + 6 = 7 + 5 = 7 + 4 =

6 + 9 = 6 + 8 = 6 + 7 =

6 + 6 = 6 + 5 = 5 + 9 =

5 + 8 = 5 + 7 = 5 + 6 =

9 + 4 =

8 + 4 = 4 + 7 =

3 + 9 =

3 + 8 = 2 + 9 =

（二）破十法练习题

18 – 9 = 17 – 9 = 16 – 9 = 15 – 9 =

14 – 9 = 13 – 9 = 12 – 9 = 11 –9 =

17 –8 = 16 –8 = 15- 8 = 14–8 =

13 – 8 = 12 – 8 = 11 –8 = 16 –7 =

15–7 = 14–7 = 13 –7 = 12 –7 =

11 -7 = 15 –6 = 14 - 6 = 13–6 =

12–6 = 11 –6 = 14–5 = 13–5 =

12–5 = 11–5 = 13-4= 12–4=

11-4= 12-3= 11-3= 11-4=