Multiplications Tricks

by Sujatha - Maths Teacher

Multiplying any number by 1) 9, 2) 99, 3)999 and soon ……………….
If you multiply any number  by single number 9 then add one zero after the unit digit, if multiplying by 99 then add two zeros after the unit  digit  and soon then  subtract the given number from the number which we add zeros at the end.

Example1: 7836 multiply by 9

Step 1 - Make 7836 as 78360

Step 2 - Now subtract 7836 from 78360

     So 78360

    _      7836
          70524

Check:

7836×9=70524  

Example 2: 3451 × 99

Solution: 345100-3451=341649

Example 3: 12345 ×999

Solution:  12345000-12345 =12332655

Isn’t this simple?