于 05-07-02 18:33:45
因为有同学眩耀会乘法, 一年级的儿子自认是聪明人, 也想学乘法. LG问他15乘3等于几?. 儿子说: "That's easy: 45". LG问他是怎么算的? 儿子说: "CLOCK 走一个quarter是15分钟,走四个 quarters 是60分钟. 走三个 quarters 是45分钟". 33 x 3 =? 3 个 3 是 9, 3 个 30 是 90, 所以是 99. 技巧还没学, 概念已很清楚. 他们学分数, 把纸折两半, 一半是1/2, 再对折, 每份是1/8
儿子这学期都在学怎么认表. 很自然就联想到他熟悉的东西. 美国教育的优势?
儿子学乘法
taro_g 发表评论于
Smart kid.
I used to teach my kid 2 digits addition ( right alignment ), but she forgot soon.
One day, I asked my daughter, how much is 21+32. She thought about it, and said 53.
"How did you get it?", I ask.
"21 = 20+1, 32=30+2, 20+30 = 50, and 1+2=3, so I got 53."
Hahaha...
I used to teach my kid 2 digits addition ( right alignment ), but she forgot soon.
One day, I asked my daughter, how much is 21+32. She thought about it, and said 53.
"How did you get it?", I ask.
"21 = 20+1, 32=30+2, 20+30 = 50, and 1+2=3, so I got 53."
Hahaha...
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