Question

Megan is putting 35 books into 3 boxes. Each box holds 15 books.

How many more books can Megan put in the boxes?

We know the answer is 10, but can't figure out why.

Answer 1

she has 35 books and 3 boxes. each box holds 15 booms so all together she had enough space for 45 boxes which means she can put in 10 more books into the last box that only has 5