Many readers have requested us to teach them a simple method to square
two and three digit numbers. In bank exams calculation speed is very
crucial. So today we have decided to explain the Squaring technique.
Technique
In case of two digit number deduct last digit and add it to another number and then add square of same.
In this technique we simplify the squaring method by making one unit's
digit zero. It is far easy to multiply 50*24 than 54*24. So I used this
technique. Try practice more to become expert in this technique.
Let's take some examples
Find square of 53.
=(53*53)
= (53+3) * (53-3) + (3*3)
=(56*50) + 9
= (560*5) + 9
= 2800 + 9 = 2809
Let's take another example
Find square of 69
= (69*69)
= (69+1) * (69-1) + (1*1)
= (70*68) + 1
= (680*7) + 1
= 4761
Let's take one more example
Find square of 45
= (45*45)
= (45-5)*(45+5) + (5*5)
= (40*50) + 25
= 2000+25
= 2025
