回复：印度的九九乘法

来源: TravellingAround 于 2010-03-27 21:26:32 [旧帖] [给我悄悄话] 本文已被阅读：次

不觉得简单呀，也可以这样：
13X12
13X10=130
13X2=26
130+26=156

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