kaylamuffina
kaylamuffina kaylamuffina
  • 16-02-2018
  • Mathematics
contestada

how you could multiple 6×99 in your head?

Respuesta :

X3N1A
X3N1A X3N1A
  • 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 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

Otras preguntas

If one magnet is mounted on a shaft, and another one is brought close with alike pole what happens to the magnets
Why does emperor qian long have reservations about mixing british and chinese cultures? a. he feels that china could learn british imperialist practices but
How did the lewis and clark expedition contract veneral disease?
By operating a boat in florida you have consented to what kind of test
What question can you ask all day where you can get a different answer every time with all the answers being correct?
How was romeo's reaction to his banishment slightly different in this version?
BaBr2 is a ionic compound, Covalent compound or a acid
Is the given number the solution of the equation
Read this excerpt from "Just One in Four Young Teens Meet US Fitness Guidelines" by Lindsey Tanner and answer the question that follows: Young teens aren't ex
uruk’s streets were lined with goods that its workshops and farms produced. therefore, we know that uruk’s complex city was based on: 1. farming and mining 2. h