Question

Eric has been donating books he no longer needs to his local library. After 3 months of donating, he had 157 books left in his room. After 8 months of donating, he had 102 books left in his room. How many books per month did Eric donate on average between months 3 and 8?

-31 books per month

-18 books per month

-11 books per month

-7 books per month

Answer 1

To find the amount of books donated between the 5 months, we have to subtract 102 from 157. So solve that and then post it.

Answer 2

-55

Answer 3

No subtract 102 FROM 157, so it looks like:

157-102=?

Answer 4

55..

Answer 5

Yes, then to find the amount of books donated each month, divide:

55/5=?

Answer 6

so 11

Answer 7

Yes.

Answer 8

Good job.