Trick for Multiplication
Trick for multiplying any number with 11
23*11= 253
lets consider, when 2 digit number are multiplied with 11.
consider 2 (2+3) 3 = 253.
34*11=3 (3+4) 4 =374.
A Simple trick for multiplying any number between 12 to 19.
Consider 13*16,
Now, strike of 1 from 16, and add 0 before 13, so it becomes,
013*6
Multilpy, 6*3= 18, units place 8
Multipy 1*6=6, 6+1+3=10, tens place 0
Multiply 0*6+1+1=2.
Therefore, the answer is, 208
23*11= 253
lets consider, when 2 digit number are multiplied with 11.
consider 2 (2+3) 3 = 253.
34*11=3 (3+4) 4 =374.
A Simple trick for multiplying any number between 12 to 19.
Consider 13*16,
Now, strike of 1 from 16, and add 0 before 13, so it becomes,
013*6
Multilpy, 6*3= 18, units place 8
Multipy 1*6=6, 6+1+3=10, tens place 0
Multiply 0*6+1+1=2.
Therefore, the answer is, 208
Replies
-
Shailaja TiwariHey ,I was also thinking to share this trick here but didn't knew how to present it .Thanks.👍😁
Well there are many such tricks that are fun to do.
How you knew about this trick? -
Anand TamariyaThis is basic algebra.
-
Shailaja TiwariIt's all about observation and fun,this is the way you can make maths amusing.
And one interesting thing is that there are many such tricks in VEDIC MATHS
Like consider 99*99=9801
999*999=998001
9999*9999=99980001
Also square of a number having 5 in units place is found as:
num*next consecutive number sqr(5)
eg: 25*25: 2*3 =6
5*5=25
.
. . 25*25=625 -
Ramani AswathThe Trachtenberg System of Basic Mathematics has many of these.
Free download here:
Download: Trachtenberg Speed Math
You are reading an archived discussion.
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