I know I know . .Do you hate math, don't ?
me too guys . Sometimes I'm very like math. .:D but Sometimes I'm hate math . ..hahahaha..
Math is easy and fun if we know the trick of it but in here I explain about multiplication . ..
This my first post about Multiplication Trick For Free . .
I have one book about math trick and tips :D Here we go. . .. .
First Trick :D
To multiply any number of two figures by 11
Write the sum of the figures between them.
Example 26 x 11 = 286.
(2 + 6 = 8; place the eight between the 2 and 6)
When the sum is of the figures is more than 9, increase the left-hand number by the 1 to carry. ,
Example
87 x 11 = 968
(8 + 7=15); add 1 to 8 to get 9; place the five between the 9 and 8)
56x11 = 616
( 5+6 =11 ): add 1 to 5 to get 6, place the one between the 6 and 5 )
To multiply any number of more than three figures by 11 find me on next posting ..okay .. ..:D
Second Tricks
To square any number of 9s
9s immediately without multiplying set down as many 9s less one (beginning at the left) as there are 9s in the given number, an 8, as many 0s as you do 9s, and a 1.
Example:
999 x 999: put down 2 9s: 99. Then an 8: 998. then 2 0s (because you have 2 9s): 99800. The append a 1: 998001. That's it!
Third Tricks
To square any number ending in 5 :
Omit the 5, and multiply the number as it will then stand, by the next higher number, and append 25 to the product.
Example:
75 x 75.
Omit the 5:7 .
Next multiply 7 by the next higher number is 8 ;
7 x 8 = 56. Finally, append 25:
5625 That's the answer: 5625.
45x45. . . . .
Omit 5:4
Next multiply 4 by the next higher number is 5;
4 x 5 = 20 append 25
That's answer 2025
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| Multiplication |
To square any compound fraction containing 1/2,
Like 5 1/2 for instance, Multiply the whole number by the next higher whole number and append 1/4 to the product.
Example
5 1/2 x 5 1/2 = 30 1/4. (5 x (5+1) = 30; tag on 1/4 to get 30 1/4.).
See you later readers . . . .
