@JosephYoiko http://en.wikipedia.org/wiki/Multiplication_table#Standards-based_mathematics_reform_in_the_USA … このへん参照 暗記モノは出来るだけ減らした方がいいのではないかって考えらしい
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@JosephYoiko http://en.wikipedia.org/wiki/Multiplication_table#Standards-based_mathematics_reform_in_the_USA … このへん参照 暗記モノは出来るだけ減らした方がいいのではないかって考えらしい