13 — 4 = 12 — 4 = 11 — 4 =
16 — 7 = 15 — 7 = 14 — 7 =
18 — 9 = 17
15 — 9 =
13 — 7 = 12
12 — 9 = 11
16 — 8 =
— 9 = 16 14 — 9 = 13 — 7 = 11 — 9 = 17 15 — 8 = 14 11
— 9 = — 9 = — 7 = — 8 = — 8 =
13 — 4 = 12 — 4 = 11 — 4 =
12 — 3 = 11 — 3 = 11 — 2 =
13 — 5 =
13 — 8 = 12
16 — 7 = 15
12 — 6 = 11
15 — 9 = 14
12 — 5 = 11 — 8 = 11 — 7 = 14 — 6 = 14 — 9 = 13 12
— 5 = — 8 = — 7 = — 5 = — 9 =
13 — 4 = 12 — 4 = 11 — 4 =
12 — 3 = 11 — 3 = 11 — 2 =
13 — 5 = 12
13 — 8 = 12
16 — 7 = 15
12 — 6 = 11
15 — 9 = 14
— 5 = 11 — 8 = 11 — 7 = 14 — 6 = 14 — 9 = 13 13
— 5 = — 8 = — 7 = — 5 = — 9 =
13 — 4 = 12 — 4 = 11 — 4 =
16 — 7 = 15 — 7 = 14 — 7 =
18 — 9 = 17
15 — 9 = 14
13 — 7 = 12
12 — 9 = 11
16 — 8 =
— 9 = 16 — 9 = 13 — 7 = 11 — 9 = 17 15 — 8 = 14 14
— 9 = — 9 = — 7 = — 8 = — 8 =
例子：
9 + 9 = 9 + 8 = 9 + 7 = 巩固练习：
7 + 9 = 7 + 8 = 7 + 7 =
9 + 9 = 9 + 8 = 9 + 7 =
【重点知识二】
破十法：退位减法使用
破十法口诀：看大数，分出10，减小数，加剩数 例子：
18 – 9 = 17 – 9 = 16 – 9 = 15 – 9 =
巩固练习：
17 – 8 = 16 – 8 = 15 – 8 = 14 – 8 =
15
(完整word版)一年级数学20以内破十法减法练习题
