又是建構式數學。有次在高登看到有人 post ，竟然有人不明白，我對那些不明白的人的評價是讀死書。台灣教改在推行，但又一堆教師和家長知其然而不知其所以然，死得。
費時失事, 愚蠢的計算方法.
With training, people with talent in visual thinking can calculate quick with this method.
Think about, for example, calculating 89 x 57 with this method. This may be better for learning the concept but eventually we still need the "textbook" methods.
Impressive demonstration but what about division and taking roots?
Sorry, this method is only for multiplication. For other operations, I guess you will have to ask the Japanese? =)
又是建構式數學。有次在高登看到有人 post ，竟然有人不明白，我對那些不明白的人的評價是讀死書。台灣教改在推行，但又一堆教師和家長知其然而不知其所以然，死得。
回覆刪除費時失事, 愚蠢的計算方法.
回覆刪除With training, people with talent in visual thinking can calculate quick with this method.
回覆刪除Think about, for example, calculating 89 x 57 with this method. This may be better for learning the concept but eventually we still need the "textbook" methods.
回覆刪除Impressive demonstration but what about division and taking roots?
回覆刪除Sorry, this method is only for multiplication. For other operations, I guess you will have to ask the Japanese? =)
回覆刪除