19 is only 1 away from 20, so you prefer to start by multiplying 20 times 5, which equals 100. Then we need to take away a squadron of 5, because there are actually only 19 squadrons, not 20. 100 take ...

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 ...

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 ...

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 ...

Mathematicians have proven the existence of a faster algorithm for multiplying large numbers, making multiplication and other ...

A pair of mathematicians from Australia and France have devised a new way to multiply numbers together, while solving an algorithmic puzzle that has perplexed some of the greatest math minds for ...

Mathematicians have reportedly discovered a new way of multiplying two numbers together. The new technique is for really large numbers, and if it passes a peer-review, could be the fastest possible ...