We all know how to multiply 2 numbers together. But what if you have 3 numbers in a multiplication sum? E.g.
2 x 11 x 3
So how could you do this? Well, if you thought do it a sum at a time, you're right. We'd do 2 x 11 first to get
22 x 3.
Which you might be able to work out is 66.
BUT - you can swap around any of these numbers in the sum and do them in whatever order you like.
3 x 11 x 2
33 x 2 = 66
2 x 3 x 11
6 x 11 = 66
It doesn't matter which order you times that 2, 3 and 11 - you'll still get the same answer! You can swap them around to make it easier - I think doing 2 x 3 x 11 is the easiest, but that's just my personal opinion.
Log onto Mathletics where you'll have "Multiply 3 single-digit numbers" - don't forget to swap the numbers around to make it easier if you need to!