印度數學乘法速算(跟直式乘法說再見)

submitted by stmichaelschool on 09/08/15 1

印度速算乘法不學你就虧報了 其他方法皆需特殊狀況 此方法可以無限推廣任何自然數相乘 講義: www.space.ntu.edu.tw/navigate/share/GLQQYXLM55 影片: www.space.ntu.edu.tw/navigate/share/GLQQYFQM55

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