20以内减法练习题（破十法)
5 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。) 例:15 - 8 = 7 10 18 — 9 = 17 — 9 = 16 — 9 = 2 15 — 9 = 14 - 9 = 13 12 — 9 = 11 16 — 8 = 15 13 — 8 = 12 16 — 7 = 15 13 — 7 = 12 - 7 = 11 15 — 6 = 14 12 — 6 = 11 13 — 5 = 12 13 — 4 = 12 12 - 3 = 11 13 — 5 = 12 13 - 4 = 12 16 — 7 = 15 18 — 9 = 17 15 - 9 = 14 13 — 7 = 12 12 — 9 = 11 16 — 8 = 15 13 — 4 = 12 12 — 3 = 11 - 3 = 11 13 - 5 = 12 13 — 8 = 12 - 8 = 11 16 — 7 = 15 12 — 6 = 11 15 — 9 = 14 13 — 4 = 12 12 - 3 = 11 13 — 5 = 12 13 — 8 = 12 16 — 7 = 15 - 7 = 14 12 — 6 = 11 15 — 9 = 14 - 9 = 13 - 9 = 13 — 4 = 12 - 4 = 11 16 — 7 = 15 18 — 9 = 17 - 9 = 16 — 9 = 17 - 8 = — 8 = 14 — 8 = 11 — 7 = 14 — 6 = 13 — 6 = 14 - 5 = — 5 = 11 — 4 = 11 — 3 = 11 — 5 = 11 - 5 = — 4 = 11 — 7 = 14 — 9 = 16 — 9 = 13 — 7 = 11 - 7 = — 9 = 17 — 8 = 14 — 4 = 11 — 5 = 11 — 7 = 14 — 6 = 14 — 9 = 13 - 9 = — 4 = 11 - 4 = — 3 = 11 — 5 = 11 — 8 = 11 — 6 = 14 - 5 = — 7 = 14 欢迎共阅
— 9 = — 8 = — 8 = — 7 = — 7 = — 6 = — 5 = — 4 = — 2 = — 4 = — 7 = — 9 = — 9 = — 8 = — 8 = — 4 = — 2 = — 5 = — 8 = — 7 = — 5 = — 2 = — 5 = — 8 = — 7 = — 4 = — 7 = — 9 =
15 - 9 = 14 — 9 = 13 — 9 = 13 - 7 = 12 — 7 = 11 — 7 = 12 - 9 = 11 — 9 = 17 — 8 = 16 — 8 = 15 — 8 = 14 — 8 = 13 — 4 = 12 - 4 = 11 — 4 = 16 — 7 = 15 - 7 = 14 — 7 = 18 — 9 = 17 - 9 = 16 — 9 = 15 - 9 = 14 — 9 = 13 — 9 = 13 — 7 = 12 — 7 = 11 — 7 = 12 - 9 = 11 — 9 = 17 — 8 = 16 — 8 = 15 13 - 4 = 12 12 — 3 = 11 13 — 5 = 12 13 — 8 = 12 - 8 = 11 16 — 7 = 15 12 — 6 = 11 15 - 9 = 14 13 - 4 = 12 - 4 = 11 12 — 3 = 11 - 3 = 11 13 — 5 = 12 13 — 8 = 12 16 — 7 = 15 12 — 6 = 11 15 — 9 = 14 13 — 4 = 12 - 4 = 11 16 — 7 = 15 18 — 9 = 17 - 9 = 16 15 — 9 = 14 - 9 = 13 - 9 = 13 — 7 = 12 - 7 = 11 12 — 9 = 11 16 — 8 = 15 13 — 4 = 12 16 — 7 = 15 18 — 9 = 17 - 9 = 16 15 — 9 = 14 - 9 = 13 - 9 = 13 — 7 = 12 - 7 = 11 12 — 9 = 11 16 — 8 = 15 13 — 4 = 12 12 — 3 = 11 13 — 5 = 12 - 5 = 11 13 — 8 = 12 16 — 7 = 15 12 — 6 = 11 - 6 = 14 - 5 = — 8 = 14 — 4 = 11 — 3 = 11 — 5 = 11 - 5 = — 7 = 14 — 6 = 14 — 9 = 13 — 5 = 11 — 8 = 11 — 7 = 14 — 6 = 14 — 9 = 13 — 7 = 14 — 9 = 17 — 8 = 14 - 8 = — 4 = 11 — 7 = 14 — 9 = 17 — 8 = 14 — 4 = 11 — 3 = 11 — 8 = 11 — 7 = 14 欢迎共阅— 8 = — 4 = — 2 = — 8 = — 7 = — 5 = — 9 = — 4 = — 2 = — 5 = — 8 = — 7 = — 5 = — 9 = — 4 = — 7 = — 9 = — 7 = — 8 = — 4 = — 7 = — 9 = — 7 = — 8 = — 8 = — 4 = — 2 = — 5 = — 8 = — 7 =
15 - 9 = 14 - 9 = 13 — 9 = 13 - 4 = 12 — 4 = 11 - 4 = 12 — 3 = 11 — 3 = 11 - 2 = 13 — 5 = 12 — 5 = 11 — 5 = 13 — 8 = 12 — 8 = 11 - 8 = 16 - 7 = 15 — 7 = 14 — 7 = 12 — 6 = 11 — 6 = 14 - 5 = 15 — 9 = 14 — 9 = 13 — 9 = 13 — 4 = 12 — 4 = 11 — 4 = 16 — 7 = 15 — 7 = 14 — 7 = 18 - 9 = 17 15 — 9 = 14 13 - 7 = 12 - 7 = 11 12 — 9 = 11 16 — 8 = 15 — 9 = 16 — 9 = 13 — 9 = 17 — 8 = 14 欢迎共阅— 9 = — 9 = — 7 = — 8 = — 8 =
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