兒子學乘法

於 05-07-02 18:33:45

因為有同學眩耀會乘法, 一年級的兒子自認是聰明人, 也想學乘法. LG問他15乘3等於幾?. 兒子說: "That's easy: 45". LG問他是怎麽算的? 兒子說: "CLOCK 走一個quarter是15分鍾,走四個 quarters 是60分鍾. 走三個 quarters 是45分鍾".  33 x 3 =?  3 個 3 是 9, 3 個 30 是 90, 所以是 99. 技巧還沒學, 概念已很清楚. 他們學分數, 把紙折兩半, 一半是1/2, 再對折, 每份是1/8

兒子這學期都在學怎麽認表. 很自然就聯想到他熟悉的東西. 美國教育的優勢?

[taro_g]

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...