18 — 9 = 17
15 — 9 = 14
12 — 9 = 11
16 — 8 = 15
13 — 8 = 12
16 — 7 = 15
20以内破十法减法练习题
凑十法儿歌 一九一九好朋友, 二八二八手拉手。 三七三七真亲密, 四六四六一起走, 五五凑成一双手。 看大数,分小数, 凑成十,加剩数。 大数记心里,小数记手里
— 9 = 16 — 9 = — 9 = 13 — 9 = — 9 = 17 — 8 = — 8 = 14 — 8 = — 8 = 11 — 8 = — 7 = 14 — 7 = 1
13 — 7 = 12 — 7 = 11 — 7 =
15 — 6 = 14
12 — 6 = 11
13 — 5 = 12
13 — 4 = 12
12 — 3 = 11
13 — 5 = 12
— 6 = — 6 = 14 — 5 = 11 — 4 = — 3 = 11 — 5 = 11 2
13 — 6 = — 5 = — 5 = 11 — 4 = — 2 = — 5 =
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 3
— 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 =
15 — 9 = 14
12 — 5 = 11 — 8 = 11 — 7 = 14 11 — 6 = 14 — 9 = 13 4
— 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 =
12 — 6 = 11
15 — 9 = 14
— 5 = 11 — 8 = 11 15 — 7 = 14 — 6 = 14 — 9 = 13 5
— 5 = — 8 = — 7 = — 5 = — 9 =