2019年一年级数学学习口诀之“凑十法、破十法、借十法”口诀最后带习题.pdf

: .
9 + 9 = 8 + 8 =
8 + 7 = 8 + 9 = 8 + 6 =
8 + 5 = 8 + 4 = 8 + 3 =
7 + 9 = 7 + 8 = 7 + 7 =7 + 6 = 7 + 4 = 7 + 5 =
6 + 9 = 6 + 8 = 6 + 7 =
6 + 6 = 6 + 5 = 5 + 9 =
5 + 8 = 5 + 7 = 5 + 6 =
4 + 9 = 4 + 8 = 4 + 7 =
3 + 9 = 3 + 8 = 2 + 9 =【 练****题. 二 】 （破十法）
18 – 9 = 17 – 9 = 16 – 9 = 15 – 9 = 11 – 4=
14 – 9 = 13 – 9 = 12 – 9 = 11 – 9 = 12 – 3 =
17 – 8 = 16 – 8 = 15 – 8 = 14 – 8 = 11 – 3 =
13 – 8 = 12 – 8 = 11 – 8 = 16 – 7 = 11 – 2 =
15 – 7 = 14 – 7 = 13 – 7 = 12 – 7 = 11 – 5 =
11 – 7 = 15 – 6 = 14 – 6 = 13 – 6 = 12 – 4=
12– 6 = 11 – 6 = 14 – 5 = 13 – 5 = 13 – 4=【 练****题. 三 】 （20 以内退位减法）
破十法口诀：看大数，分出10；减小数，加剩数。
15 － 6 = 12 － 5 = 17 － 9 =
13 － 4 = 11 － 5 = 14 － 7 =
16 － 8 = 15 － 9 = 18 － 9 =
12 － 7 = 14 － 9 = 13 － 7 =
12 － 9 = 11 － 3 = 12 － 4 =