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

Joel bought 8 books. Some books cost $13 each and some cost $17 each. In all, he spent $128. Which system of linear equations represents the given situation?
Determine the discriminant for the quadratic equation –3 = x2 + 4x + 1. Based on the discriminant value, how many real number solutions does the equation have?
Without a calculator work out: 9 ÷ 0.1
If two animals are the same genus, then they must also be the same family, order, class, phylum, and kingdom. True or False
Which 18th century invention enabled navigators to tell time accurately regardless of weather conditions or motion of the ship?
I need help on this question please!!!!!
Defining a business in terms of goods and services rather than in terms of the benefits customers seek is called _____.
Plz help with this question I don’t know what to write I need good answer to this question
how many grams of bromine, br2, are required to react completely with 37.4 grams of aluminum chloride, AlCl3?
Answer ASAP plz this is hard for me