Multiplying by 9’s

Did you know that when you multiply a 9 by another single digit that the digits of the product will add up to 9? This an easy way to help you remember the multiples of 9 and is helpful in checking your answer.

Let’s take a look:

Notice that the 1 and the 8 in the 18 add up to 9!

Here are a couple more…

Now you try:

9 x 3 =

6 x 9 =

9 x 7 =