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Would you like to sell videos?

目で見る算数

All videos
¥ 680 (1 month)
All videos
¥ 680 (1 month)
A video doesn't play smoothly ?

水そうにみる平均

目で見る算数

平均ってどういうことなのだろう？おや？いくつかの部屋に分かれた水槽が用意されています。仕切り板を抜いたときの水の動きや高さに注目してみよう！

All videos
¥ 680 (1 month)
Details of how to purchase here.
Details of how to purchase here.

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