こんにちは!「100日後にそろばん完全マスター!」の主です。 Youtube54日目の動画「そろばん5級 2桁×4桁・3桁×3桁・4桁×2桁のやり方」の内容を簡単に解説します。 桁数が増えてなんだかむずかしそうと思った方、安心してください!はいてますよ ...
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 ...
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 ...