凑十法-破十法-练习题

凑十法练习题.

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

9 + 3 =

9 + 8 =

8 + 7 =

8 + 5 =

7 + 9 =

7 + 6 =

9 + 2 = 9 + 9 = 8 + 9 = 8 + 4 = 7 + 8 = 7 + 4 = 9 + 7 = 8 + 8 = 8 + 6 = 8 + 3 = 7 + 7 = 7 + 5 = 6 + 9 = 6 + 8 = 6 + 7 =

6 + 6 = 6 + 5 = 5 + 9 = 5 + 8 =

4 + 9 =

3 + 9 =

18 – 9 = 17

14 – 9 = 13 5 + 7 = 5 + 6 = 4 + 8 = 4 + 7 = 3 + 8 = 2 + 9 = 破十法练习题

– 9 = 16 – 9 = 15 – 9 = 12 – 9 = 11 9 = 9 = –

–

17 – 8 = 16 – 8 = 15 – 8 = 14 – 8 =

13 – 8 = 12 – 8 = 11 –

15 – 7 = 14 – 7 = 13 – 7 = 12 11 – 7 = 15 – 6 = 14 – 6 = 13

–

– 7 =

–

8 = 16 7 =

6 =

12 – 6 = 11 – 6 = 14 –

12 – 5 = 11 – 5 = 13 – 4= 12

11 – 4= 12 – 3 = 11 – –

–

– 2 =

5 = 13 5 =

4= 3 = 11