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**Solve the following problems. Show your work. Check your answer for reasonableness. You can sketch rectangles to help you.**

- 2 87 = ?
- 23 9 = ?
- 9 13 = ?
- 34 9 = ?
- 4 79 = ?
- 18 7 = ?
- 6 68 = ?
- 53 8 = ?
- 42 5 = ?

- Solve 3 37. Write a story and draw a picture to match your solution.
- Explain why your answer to Question 8 is reasonable.
- Luis drew a rectangle to help him solve 34 5. Then he recorded his work using Mara's method. “Something does not seem right,” Luis said. What would you tell Luis to help him correct his mistake?