Multiplying and dividing whole numbers by numbers greater than 0 and less than 1 can be broken into a whole number calculation followed by multiplying or dividing by a power of 10, for example 10, 100 ...

The process of multiplying three numbers together is similar to the process of multiplying two numbers, but it has one extra step. First, you multiply two of the numbers, then you multiply the third ...

Also see: WATCH: Genius maths hacks: The 11 times table Our latest video (scroll up to see), multiplying teen numbers, was inspired by a hack sent in by one of our readers, Jack Greenblatt.

A maths tutor on TikTok has gone viral after he revealed a hack for quickly and easily multiplying by nine. Brady Kelly (@bradyyourtutor) from Orlando, Florida, opens the video boldly saying: ...