HUNTERTUTORING

Review — Difficulty 8/10

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1.OA.B.4 · Understand subtraction as an unknown-addend problem

Review skills for this standard. Write answers where shown.

Together with a parent

1. Discuss: Understand subtraction as an unknown-addend problem. For example, subtract 10 - … 2. What was easy? What was tricky? 3. Use the diagram to model one example.

Written review

1. 4 + 5 = ___ 2. 9 − 5 = ___ 3. 28 − 4 = ___ 4. Fill in: 7 + ___ = 13 5. Story: 4 apples and 5 more. Total? ___ 6. Story: 9 stickers, give away 5. Left? ___

_See printable PDF for diagram._

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Skills checklist

  • [ ] Adds and subtracts accurately in range
  • [ ] Uses a model or strategy
  • [ ] Checks answers when possible
  • [ ] Explains Understand subtraction as an unknown-addend problem without prompts

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