Quick Multiplication Techniques

Quick Multiplication Techniques

Faster Multiplication:-

·         Multiplying 2-digit numbers by 2 digit numbers.

·         Multiplying 3-digit numbers by 3 digit numbers.

Let us consider example.

1.Example

75x

75

--------------

375

+ 3750 ------(Normal way of Calculation)

--------------

5625

-------------

As above, is a normal way to calculate 2digit number by 2digit numbers. Let us do it using fast multiplication method

2. Example 

          6  5

           X

7   <- 6  5

------------

      4225

------------

Explanation of Quick Multiplication Technique is as follows:-

·         We multiply 5 multiply by 5 and put 25 as right-hand side of the answer.

·         We added 1 to the top left digit 6 to make it 7.

·         We then multiplied it ( 7 ) by the bottom left digit 6 and got 42, which is the left-hand side of the answer.

·         We got the correct answer 4225.

Similarly we can multiply 15 by 15, 25 by 25, 35 by 35 etc. This formula is not limited to same number or ending with 5. We can apply this formula to multiply a good number of two-digit and three digit numbers.

BY: SHALINI VELLASAMY <3