Multiplying numbers nearing 100

Short Cut Tip# 2

This is a short cut technique to multiply two numbers nearing 100. You may use it to find square of a number nearing 100 , e.g. 99^2 , 102^2 etc.

Note : For numbers more than 100 ,on R.H.S. just write (+) ,and in place of diagonal subtraction ,do addition .