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note5月

#37 【暗算6級】2桁×1桁のかけ暗算のやり方 -[Mental Arithmetic Level 6] How ...

こんにちは！「100日後にそろばん完全マスター！」の主です。 Youtube37日目の動画「暗算6級 2桁×1桁のかけ暗算」の内容を簡単に解説します。 第二章のそろばん10.9級編のかけ算のやり方をマスターしていれば、2桁×1桁のかけ暗算の計算もスムーズにできる ...
BBC3年

Multiply a 2-digit by a 1-digit number

It's possible to solve some multiplication problems in your head. But sometimes it can help to use other methods instead. These include using visual aids, such as an array or place counters, or by ...
BBC1年

Multiply a 2-digit by a 1-digit number

It's possible to solve some multiplication problems in your head. But sometimes it can help to use other methods instead. These include using visual aids, such as an array or place counters, or by ...