hello, In this post we are going to discuss about the short tricks of the Multiplication
I think all of u know know the multiplication. so we will discuss the short and tricky method to calculate the multiplication. We follow the different tricks in different situation. Some of the most common tricks given below which helps to do fast calculation in the questions.
Trick 1: ever-green trick
(i) Two digit numbers multiplication :
example :
59 × 74 = ? or 5 9
× 7 4
Sol. :
Step 1: First multiply right digits.
9 × 4 = 36 = (3 carry) (6)
Step 2: Multiplication of cross digits and add it as following. And add carry if it is.
( 7 × 9 ) + ( 4 × 5 ) = 63 +20 =83
83 + 3 = 86 = (8 carry ) (66)
35 + 8 = 43 (66) = (4366)
Answer is : 4366
(ii) Three digit numbers multiplication :
example :
251 × 432 = ? or 2 5 1
× 4 3 2
Sol. :
Step 1: First multiply right digits.
1 × 2 = 2 = (No carry) ( 2 )
( 3 × 1 ) + ( 2 × 5 ) = 3 + 10 = 13
(1 carry ) (32)
Step 3: Multiplication of cross digits and middle digits in following manner and add it as following. And add carry if it is.
( 4 × 1 ) + ( 2 × 2 ) + ( 5 × 3 ) = 4 + 4 + 15 = 23
20 + 1 = 24 = 2 carry (432)
Step 4: Multiplication of cross digits in following manner and add it as following. And add carry if it is.
( 4 × 5 ) + ( 3 × 2 ) = 20 + 6 = 26
26 + 2 = 28 = 2 carry (8432)
4 × 2 = 8
8 + 2 =10 (108432)
Answer is : 108432
Trick 2: when the numbers are near about "100" .
Step 1: First find how much the greater (+) or lesser (-) than the 100.
Step 2: Addition (say X) / Multiplication (say Y)
Step 3: use formula
Answer = [100 + (X)] × 100 + (Y)
example 1: when both numbers are lesser than '100'.
92 × 93 = ?
Sol. :
Answer is : 8556
example 2: when both numbers are greater than '100'.
106 × 108 = ?
Sol. :
Answer is : 11448
example 3: when one number is greater and one number is lesser than '100'.
105 × 94 = ?
Sol. :
Answer is : 9870
Trick 3: (Same and Ten Rule) when the unit place digit sum is 10 and the 10th place digit is same.
Concept :
[ Answer = (same digit) × (same digit + 1) / multiplication of unit place digit ]
example 1:
43 × 47 = ?
Sol. :
43 × 47
4 × (4 + 1) / 3 × 7
4 × 5 / 21
20 / 21
Answer is : 2021
example 2:
104 × 106 = ?
Sol. :
104 × 106
10 × (10 + 1) / 4 × 6
10 × 11 / 24
110 / 24
Answer is : 11024
Trick 4: (Ten and same Rule) when the 10th place digit sum is 10 and the unit place digit is same.
Concept :
[ Answer = (multiplication of 10th place digit + same digit) / multiplication of same digit ]
example 1:
83 × 23 = ?
Sol. :
83 × 23
(8 × 2) + 3 / 3 × 3
16 × 3 / 9
19 / 09
Answer is : 1909
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