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- Tom was working on the problem below when the fire alarm rang. Finish his problem using the all-partials method.
- Use Tom's all-partials method to solve these problems.
Check to see if your answer is reasonable. 
- Explain an estimation strategy that shows your answer to Question 2D is reasonable.
- Maruta started the problem below. Finish it using the compact method.
- Why did Maruta put a 1 above the 6?
- Use Maruta's compact method to solve these problems. Check to see if your answer is reasonable.
- Explain an estimation strategy that shows your answer to Question 6C is reasonable.
- Solve these problems. Use the Addition Strategies Menu in the Reference section to choose a method.
- Explain an estimation strategy that shows your answer to Question 7A is reasonable.
