BBC

How do I multiply two-digit numbers more easily?

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 ...
PBS

Multiply with multiples of 10

Learn about multiplying one-digit whole numbers by multiples of 10. Join Ms. Askew to talk about numbers with her Math Mights friends, and then learn about multiplying one-digit whole numbers by ...
RealClearScience

We've Found a Quicker Way to Multiply Really Big Numbers

Methods similar to this go back thousands of years, at least to the ancient Sumerians and Egyptians. Around 1956, the famous Soviet mathematician Andrey Kolmogorov conjectured that this is the best ...
BBC

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 ...
EdSurge

A 'Magical' Trick for Multiplying, Japanese Style

THIS AIN'T YOUR FATHER'S MATH: Here's a bit of low-tech edtech that might just relieve some of the anxiety around multiplying double and triple digit numbers. The Magical Maths blog reports that the ...