小5算数 3. 比例① 体積を求めよ #オンライン授業 #たっくん

2021 8:52
Synopsis
バレンタインのお返しに向けて、板チョコを買ってきたぞ! 体積はいくつになるのかな?積み上げていくと、とある法則が・・・ ...
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