conerly927 conerly927

20-09-2017
Mathematics

contestada

What is 81-16 using mental math

Respuesta :

apologiabiology apologiabiology

20-09-2017

I know in my head that 16=20-4
so -16=-20+4

so 81-16 really means 81-20+4
I can first subtract 20 from 81 to get 61
then add 4 to get 65
that's my mental process to get 81-16 without writing anything down

Answer Link

AnimeBrainly AnimeBrainly

20-09-2017

81 - 16 = 65 because

80 - 15 = 65

(you just subtract 1 from both 81 and 16 to get easier numbers to minus)

hope this helps

Answer Link

ACCESS MORE ACCESS MORE ACCESS MORE ACCESS MORE

Otras preguntas

What is the difference between human anatomy and earthworm anatomy?

How do we measure the amount of acidity in rain?

Select the two works that Karl Marx wrote. Mein Kampf Communist Manifesto Human Manifesto Common Sense Das Kapital

Which of the following would an economist most likely classify as a need?. A.gasoline for a florist's delivery truck.. B. a college degree. . C. a flat-screen t

In what climate zone is Iowa (IA) located?

Resiliency is defined as the ability to ______.

Which sentence is NOT awkward? She said hello and then went inside. She said hello and then go inside. She says hello and then went inside. She said hello, and

What is the equation in point-slope form of a line that passes through the points (5, −3)(5, −3) and (−2, 9)(−2, 9) ? y−3=−2(x+5 y+3=−127(x−5) y+3=−2(x−5)

what kind of sentence structure is this: Everyone in Whoville, now Originalville, is their own individual, and they wouldn’t have it any other way. is it a simp

What is the rarest mineral in the world?