Easy Squaring Shortcut 7

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Easy Squaring Shortcut 7

Finding Square of a number which is between 1000 and 1100

1:Choose a number between 1000 and 1100.
2:first two digits are: 1,0 _ _, _ _ _
3:Find the difference between your number and 1000.
4:Multiply the difference by 2: 1,0 X X, _ _ _
5:Square the difference: 1,0 _ _, X X X
Ex:
If the number to be squared is 1009:
The first two digits are: 1,0 _ _, _ _ _
Find the difference: 1009 - 1000 = 9
Two times the difference: 2 × 9 = 18:
1,0 1 8, _ _ _
Square the difference: 9 × 9 = 81:
1,0 1 8, 0 8 1
So 1009 × 1009 = 1,018,081.


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