W. Sample of Problems
Use a paper-and-pencil or mental math strategy to solve each problem.
Use the Addition Strategies Menu in the Student Activity Book Reference section.
- 27
+ 19 - 78
+ 43 - 86
+ 97
- Explain how you know your answer is reasonable for Question C.
- Choose one problem you solved with a paper-and-pencil method. Solve it again with a mental math strategy.