Base 100 multiplication trick
by Francis[ Edit ] 2013-06-25 17:05:38
Base 100 Multiplication Trick
The numbers between 100 and 200 to take the multiplication.
Rules:
Rule 1 : Multiplicand added by Multiplier minus 100. And then multiply by 100.
Rule 2 : Assign x is multiplicand minus 100 and y is multiplier minus 100.
Rule 3 : Multiply x and y.
Rule 4 : Add rule 1 result to the rule 3 result. Its a final result.
Example 1: 105 X 107
Rule 1 : (105 + 7) X 100 = 112 X 100 = 11200
Rule 2 : x = 105 - 100 = 5, y = 107 - 100 = 7
Rule 3 : 5 X 7 = 35
Rule 4 : = 11200 + 35 = 11235
105 X 107 = 11235
