こんにちは！「100日後にそろばん完全マスター！」の主です。 Youtube47日目の動画「そろばん6級 3桁×2桁・2桁×3桁のやり方」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」と呼ばれる方法で解説していて、そろばん界のドンである ...

Ever wanted to impress everyone by solving complex multiplication problems in your head, without needing a pencil or paper? It's not magic; it's mental math—a superpower you can learn! This article is ...

Find out what multiples are and how to sort multiples of 2 and 5. Doubling numbers Learn how to make doubles using ten frames, addition and multiplication. Counting in twos, threes, fives and tens ...

When you multiply decimals by integers (whole numbers), you can use everything you already know about multiplying multi-digit numbers. You can use written or mental methods to multiply decimals by ...