Thursday, July 17, 2008

TIPS for calculating math faster(2)

how to calculate 23 x 27 less than 2 seconds?
here it is:
23 x 27 = ...
i) add 1 to 2 = 3, then multiply by 2 = 3 x 2 = 6
ii) multiply 3 by 7 = 3 x 7 = 21
the answer is 621.


try for 36 x 34 = ...
i) add 1 to
3 = 4, then multiply by 3 = 4 x 3 = 12
ii) 6 x 4 = 24.
the answer is 1224.

easy right?
now, do exercises with other numbers! try until u can do it <>
can you find the rules that applies for these multiplications?
all the best for you!!!


2 comments:

dhawuh said...

wow tips bagus buat belajar anak pak. makasih

mamo said...

ok, semoga bermanfaat.

it's free....

if you find any difficulties in math, please don't hesitate to contact me, please send your question to hi-mamo@hotmail.com i'll do my best.

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