Unit 6 Contents

Check-In: Questions 7–10

7. Use the Addition Strategies Menu from the Student Activity Book to solve the problems. Try to use each strategy at least once. Check to see if your answers are reasonable.
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8. Solve Question 7D using base-ten pieces. Show how you solved it using base-ten shorthand. Then record your work on a base-ten recording sheet.




9. Solve Question 7E a second way using a mental math strategy. Explain your method.
10. Explain your strategy for deciding if your answer to Question 7G is reasonable.