Question

Estimate the sum 9/10 + 7/8 A.about 0 B.about 1 C.about 1/2 D. about 2

Answer 1

Hey there James!

Your answer: 71/40 = 1.77500 which is about 2.

We simplify 7/8

9/10 + 7/8

We find that the least common multiple is 40.

So we do,
`(9*4+7*5)/(40) = 71/40`

Your answer is about 2.

~Jurgen

Answer 2

First you would start getting the denominators to the same number and you could do this by multiplying 9/10 by 4, and 7/8 by 5 to get the denominators to 40 and when you add the fractions you get 71/40 so the answer would be D. About 2