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LESSON 4 Paper-and-Pencil Subtraction
Kathy decided to record her work on a base-ten recording sheet. Here is her work for the problem 573 − 289:
- Review Kathy's work with base-ten pieces on the first Subtracting with Base-Ten Pieces page in Lesson 3. Discuss how Kathy's written work above matches her work with the base-ten pieces.
- How can you tell that she traded 1 skinny for 10 bits?
- Why are there two numbers crossed out in the middle column?
Sara looked at Kathy's work.
Sara solved Kathy's problem like this:
