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凑十法练习题
1.
拆
小
数
,
凑
大
数
9 + 9 = 9 + 8
= 9 + 7 =
9
+ 6 = 9 + 5 =
9 + 4 =
9 + 3 =
9 + 2 =
8 + 7 =
8 + 6 = 8 + 5 =
8 + 4 = 8 + 3
= 7 + 7 =
7
+ 6 = 7 + 5 =
6 + 6 = 6 + 5
=
8 +
8 =
7 + 4 =
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