1 年生の繰り下がりのある引き算の指導改善を目指した研究

Overview of attention for article published in Japan Journal of Mathematics Education and Related Fields, April 2020

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ブロックなんかは使いやすいと思った人が使えばいい．解き方が自由なのが数学の世界なのにね．

1 年生の繰り下がりのある引き算の指導改善を目指した研究 https://t.co/4YB3yTe7jx

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