Most of us have a nightmare of Math.. So did i
But after i came acrpss tricks like this i have started to love calculation
Many of us are i m sure so handicapped with calculators in our lifes..
I thought i should make Math friend and tried learning various tricks about
Will like to share it with all
Magic 1 : Multiplication of any number with 11
Let us take any number say,
24*11 =?
add 2+4 =6
write 2 4 as it is with a gap in between
and write the added sum i.e 6 in between 2 4 , that makes it 264
Answer is 264
Lets multiply 69 *11
Add 6+9 =15
write the once digit in the middle and let the 10s place be a carry for the 100th place in the answer
1
6 5 9
That makes it 759
69*11=759
Isnt it so simple?
Magic 2: Square of numbers ending with 5
Multiplication of 5 has always been every1 s favorite.
Now even the 2 digit or more ending with 5 numbers can be on ur finger tips
Lets multiply
45 *45 = ?
Take the 10s digit of both the numbers and increment the 1st number by 1
That is (4+1)*4 = 20 Write it on the Left hand side
20 _ _
On the Right hand side Square
(5*5) = 25
2025 is the Answer
Lets take another eg
75 *75 =?
(7+1)*7 =56
5*5=25
75*75=5625 Answer
Will come back with loads more trick
Wednesday, September 16, 2009
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