标签 乘法

标签: 乘法

是谁发明了九九乘法表?(图)

背了这么多年,你知道九九乘法表是怎么来的吗?你是否有想过为什么要用“九”而不是“八”?今天就来讲讲九九乘法表那些事儿。 是谁发明了九九乘法表?...

印度式乘法口訣 萬人推薦的超好用...

印度的九九表是從1背到19,不過您知道印度人是怎麼記11到19的數字嗎?新的乘法非常好用,各位不妨學一學吧! 印度式計算訓練 請試着用心算算出下面...

印度的 19X19乘法——非常好...

非常好用新的乘法 , 不妨學一學 當台灣媽媽因為小朋友會背99乘法高興的同時, 印度小孩已經在背1919乘法了! 難怪近幾年印度進步得那麼快 ...
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