【flash たしざん】level.3-1 1問7秒 知育 脳トレ addition Arithmetic 1question 7seconds

2019 3:12
Synopsis
フラッシュ暗算を応用した、Flashたしざんです。画面に計算式が出ますので声に出したり、頭の中で問題を解いていってください ...
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