こんにちは！「100日後にそろばん完全マスター！」の主です。 第四章のそろばん7級編がついに始まりました！ Youtube31日目の動画「そろばん7級 2桁×2桁のかけ算のやり方」の内容を簡単に解説します。 ちなみに、速く答えを出せる「両落とし」と呼ばれる ...

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 ...

The method that we learn in school is a long multiplication method. But this method is very time consuming. SO let’s learn a much faster way to multiply a 2-digit number by 11. Step 1 - Write 3 and 6 ...