kaylamuffina kaylamuffina

16-02-2018
Mathematics

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how you could multiple 6×99 in your head?

Respuesta :

16-02-2018

99 is 1 less than 100.
(100-1)×6

100×6=600
-1×6=-6

600-6=594

Answer: 594

Answer Link

mathmate mathmate

16-02-2018

Since 99=100-1,
we use the distribution property,
6(99)=6(100-1)=600-6 = 594

With minimum practice, the technique can be mastered in a short time.

For example, 15*998 = 15(1000-2) =15000-30=14970

Answer Link

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