Two digit multiplication with 99

Today we will try multiplication with 99.

Ex 1 : 23 x 99

Multiplication with 99 can be done by subtraction

result = 23 -1 / 99 - (23 -1 )
          = 22 /  99-22
          = 22 / 77
          = 2277

How to do?

1. Just subtract 1 from number(not 99). So here other than 99 is 23 

Hence 23 - 1 = 22

2. Subtract resultant value from 99

 Hence 99 - 22 =  77

Result = 22 / 77 = 2277

Please note here also there is no carry forward

Try following examples

56 x 99
34 x 99
76 x 99
85 x 99

Lets see how to multiply with 25 in next post