There is a little trick for the nines. There are two ways to do them. Choose which one you will prefer, but here are the tips.

 

1st way to do it

What you do for the first trick is you add 10 and minus 1. For example 8 x 9 = 72 because 9 (1 x 9), 18 (2 x 9), 27 (3 x 9), 36 (4 x 9), 45 (5 x 9), 54 (6 x 9), 63 (7 x 9), 72 (8 x 9)

 

2nd way to do it

To do this one you turn the 9 into a 10 so for example 3 x 9 = 27. To do that (and other sums of 9) you do it like this. 3 x 10 = 30 and then minus the number you’re multiplying with 9, so then it will look like this. 3 x 10 = 30 – 3 = 27!

 

Choose any you think is easier.