Fraction Ruler (分数ものさし)

by tonagai
  scripts
  sprites
See inside
Instructions

分数をクリックすると赤くなり、1/12の何倍かがわかります。
個数を数えることで分数の足し算、引き算、割り算が視覚的にわかります。
Click on a fraction, then a rectangular turns red. Let's see how many "1/12" squares are included. Then you can visually appreciate adding, subtracting, and dividing fractions.

Notes and Credits

浜松市の小学生、山崎賢一朗くんが考案した分数ものさしです。
The fractional ruler was invented by Yamazaki-kun, an elementary school student in Hamamatsu city
http://www.asahi.com/articles/ASK3X5Q9ZK3XUTPB00W.html
https://matome.naver.jp/odai/2149120027043122001

Shared: 2 Aug 2017 Modified: 2 Aug 2017
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