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#153 The Happier You Are, the More You Focus on 'Variables'

In mathematics, there is a concept of 'constants' and 'variables.' Even if you don't like math, you may have heard these terms somewhere before. There is no need to overthink it. It is exactly as the ...
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『Niigata's Arithmetic Story』 First edition published in 1982, Edited by Niigata Prefecture Arithmetic Education Research Association, Published by Nihon Hyojun

Speaking to the children of Niigata about Niigata through "arithmetic"—a masterpiece of arithmetic reading material from Niigata in 1982 that interprets regional culture, industry, and nature from the ...