20 以内减法借十法练习题
口诀： 进位加法（凑十法口诀：看大数，分小数，凑成十，算得数）
退位减法（破十法口诀：看大数，分出 10，减小数，加剩数）
如嫌题目太少可更改数字
例：15 — 8 = 7
5
10
2
（一）
18 — 9 =
17 — 9 = 16 — 9 =
15 — 9 = 14 — 9 = 13 — 9 =
12 — 9 = 11 — 9 = 17 — 8 =
1
（二）
16 — 8 =
13 — 8 =16 — 7 = 13 — 7 = 15 — 6 = 12 — 6 =
15 — 8 = 12 — 8 = 15 — 7 = 12 — 7 = 14 — 6 = 11 — 6 =
2
14 — 8 =
— 8 =
14 — 7 =
11 — 7 =
13 — 6 =
14
— 5 =
11
（三）
13 — 5 =
13 — 4 = 12 — 3 = 13 — 5 = 13 — 4 = 16 — 7 =
12 — 5 = 12 — 4 = 11 — 3 = 12 — 5 = 12 — 4 = 15 — 7 = 11 — 5 =
11 — 4 =11 — 2 =
11 — 5 =
11 — 4 =14 — 7 =
3
（四）
18 — 9 =
17 — 9 = 16 — 9 =
15 — 9 = 14 — 9 = 13 — 9 =
13 — 7 = 12 — 9 = 16 — 8 = 13 — 4 = 12 — 7 = 11 — 9 = 15 — 8 = 12 — 4 = 11 — 7 =
17 — 8 =14 — 8 =
11 — 4 =
4
（五）
12 — 3 =
13 — 5 = 13 — 8 = 16 — 7 = 12 — 6 = 15 — 9 =
11 — 3 = 12 — 5 = 12 — 8 = 15 — 7 = 11 — 6 = 14 — 9 = 11 — 2 =
11 — 5 =
11 — 8 =
14 — 7 =
14 — 5 =13 — 9 =
5
（六）
13 — 4 =
12 — 3 = 13 — 5 = 13 — 8 = 16 — 7 = 12 — 6 =
12 — 4 = 11 — 3 = 12 — 5 = 12 — 8 = 15 — 7 =11 — 6 = 11 — 4 =
11 — 2 =
11 — 5 =
11 — 8 =
14 — 7 =
14 — 5 =6
（七）
15 — 9 =
13 — 4 = 16 — 7 = 18 — 9 = 15 — 9 = 13 — 7 =
14 — 9 = 12 — 4 = 15 — 7 = 17 — 9 = 14 — 9 = 12 — 7 = 7
13 — 9 =
— 4 =
14 — 7 =
16 — 9 =
13 — 9 =
11 — 7 =
11
（八）
12 — 9 =
11 — 9 = 17 — 8 =
16 — 8 = 15 — 8 = 14 — 8 =
13 — 4 = 16 — 7 = 18 — 9 = 15 — 9 = 12 — 4 = 15 — 7 = 17 — 9 = 14 — 9 = 8
— 4 =
14 — 7 =
16 — 9 =
13 — 9 =
11
（九）
13 — 7 =
12 — 9 = 16 — 8 = 13 — 4 = 12 — 3 = 13 — 5 =
12 — 7 = 11 — 9 = 15 — 8 = 12 — 4 = 11 — 3 = 12 — 5 = 11 — 7 =
17 — 8 =14 — 8 =
11 — 4 =
11 — 2 =
11 — 5 =
9
（十）
13 — 8 =
16 — 7 = 12 — 6 = 15 — 9 = 13 — 4 = 12 — 3 =
12 — 8 = 15 — 7 = 11 — 6 = 14 — 9 = 12 — 4 = 11 — 3 = 11 — 8 =
14 — 7 =
14 — 5 =13 — 9 =
11 — 4 =
11 — 2 =
10
（十一）
13 — 5 =
13 — 8 = 16 — 7 = 12 — 6 = 15 — 9 = 13 — 4 =
12 — 5 = 12 — 8 = 15 — 7 =11 — 6 = 14 — 9 = 12 — 4 = 11 — 5 =
11 — 8 =
14 — 7 =
14 — 5 =13 — 9 =
11 — 4 =
11
（十二）
16 — 7 =
15 — 7 = 14 — 7 =
18 — 9 =15 — 9 =13 — 7 =12 — 9 =16 — 8 =17 — 9 = 14 — 9 =12 — 7 =11 — 9 =15 — 8 =16 — 9 =
13 — 9 =
11 — 7 =
17 — 8 =14 — 8 =
12
（十三）
13 — 4 =
16 — 7 = 18 — 9 = 15 — 9 = 13 — 7 = 12 — 9 =
12 — 4 = 15 — 7 = 17 — 9 = 14 — 9 = 12 — 7 = 11 — 9 = 13
11 — 4 =
14 — 7 =
16 — 9 =
13 — 9 =
11 — 7 =
17 — 8 =
（十四）
16 — 8 =
13 — 4 = 12 — 3 = 13 — 5 = 13 — 8 = 16 — 7 =
15 — 8 = 12 — 4 = 11 — 3 = 12 — 5 = 12 — 8 = 15 — 7 =14 — 8 =
11 — 4 =
11 — 2 =
11 — 5 =
11 — 8 =
14 — 7 =
14
（十五）
12 — 6 =
11 — 6 = 14 — 5 =
15 — 9 = 13 — 4 = 12 — 3 = 13 — 5 = 13 — 8 = 14 — 9 = 12 — 4 = 11 — 3 = 12 — 5 = 12 — 8 = 13 — 9 =
11 — 4 =
11 — 2 =
11 — 5 =
11 — 8 =
15
（十六）
16 — 7 =
12 — 6 =15 — 9 =13 — 4 =16 — 7 = 18 — 9 =
15 — 7 = 11 — 6 = 14 — 9 = 12 — 4 = 15 — 7 = 17 — 9 = 16
14 — 7 =
14 — 5 =13 — 9 =
11 — 4 =
14 — 7 =
16 — 9 =
（十七）
15 — 9 =
13 — 7 = 12 — 9 = 16 — 8 =
14 — 9 = 12 — 7 = 11 — 9 = 15 — 8 = 13 — 9 =
11 — 7 =
17 — 8 =14 — 8 =
17
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