Joe’s mother gave him $56 to go to the store. Joe bought 7 notebooks and 2 books. Each notebook costs $4 and each book costs $7. How much money does Joe have left?
Let's be accurate as possible and think first.
14
7 notebooks cost 7 notebooks x $4 / notebook = $28.

2 books cost 2 books x $7 / book = $14.

In total Joe has spent $28 + $14 = $42.

He has $56 - $42 = $14 left.

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The final answer: 14