Simon has 45 books evenly spread in 5 cartons . He gave books to readers from one carton. The first reader got 3 books and the second reader got 4 books. How many books are remaining in one carton ?
2 books because 45 total books divided by the 5 crates is 9. Then the first reader took 3 books, and then the second reader took 4 books whch is 7 books in total. And 9-7 is 2.
