Answer:
2 books
Step-by-step explanation:
If each box can hold seven books you can do 7 x 4 and get 28. From there you have two books left over and 4 full boxes. Hope this helps.
2 books.
Because 7×2 is 28 and the goal is thirty and we can't get any higher than that so you can multiply it 4 time and get a leftover of 2.
