No.4

Multiplying by 11

1. Multiplying a one-digit number by 11 is a cinch. For example: 2(11)=22

But did you know there’s a trick to multiplying any number by 11? 

 Here’s how, using an example: 54 x 11.

The first digit of the answer will be 5 and the last digit of the answer will be 4. To get the digit between, just add 5 and 4.     5 (5+4)4= 594