When multiplying a 2-digit number by a 1-digit number you can use both mental and written methods. Let's take a look at an example of solving a multiplication problem in your head. Before you ...
27 = 20 + 7, so to multiply by 27 we could multiply by 20 (x10 and then x2) and multiply by 7. The 2 from 24 has carried ... The aim of the game is to be the player with the smallest answer ...