凑十法-破十法-练习题
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凑十法练习题.
6 + 6 = 6 + 5 = 5 + 9 =
5 + 8 = 5 + 7 = 5 +
6 =
4 + 9 = 4 + 8 = 4 + 7 =
3 + 9 = 3 + 8 = 2 + 9 =
破十法练习题
18 –9 = 17 – 9 = 16 – 9 = 15 –9 =
14 –9 = 13 – 9 = 12 –9 = 11 –9 =
13 –8 = 12 –8 = 11 –8 = 16 –7 = 15 –7 = 14 –7 = 13 –7 = 12 –7 = 11 –7 = 15 – 6 = 14 – 6 = 13 – 6 =
12 – 5 = 11 – 5 = 13 –4= 12 –4= 11 –4= 12 – 3 = 11 – 3 = 11 – 2 =