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 ...

This article reveals a simple and effective shortcut for multiplying numbers that end in 5. Perfect for students, it breaks down the trick for both single-digit and double-digit numbers ending in 5, ...

Back in primary school when we were learning how to multiply two, multi-digit numbers by hand, our teacher showed us a little trick to verify that we had the correct result calculated. I was impressed ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Hello! Today we're going to break numbers into their parts. Numbers are written in parts. When we look ...

Space to play or pause, M to mute, left and right arrows to seek, up and down arrows for volume. Today we're investigating how numbers can be represented in different ways. It's important that we ...