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Fourth/Addition

Missing Addend (Whole Tens)

Missing addend when the step is a whole ten.
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Study Guide

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Practice Questions

  1. 34 + ? = 84
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    50

  2. 27 + ? = 67
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    40

  3. 65 + ? = 95
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    30

  4. 48 + ? = 68
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    20

  5. 53 + ? = 93
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    40

Teacher Resources
Teaching Notes

Connect to subtraction as a check.

Common Mistakes
  • Forgetting place value
  • Incorrect subtraction
  • Confusing tens and ones
  • Miscounting tens
Differentiation
SupportUse physical manipulatives or number lines. Practice skip counting by tens.
ChallengeSolve multi-step problems with tens. Challenge with hundreds or thousands.
Discussion Questions
  • How is adding tens like adding ones?
  • What strategy did you use?
  • Explain your reasoning with tens.
  • Model with tens blocks or number line.
Learning Path
Skill Cluster

Number Sense and Operations

Estimated Time

8 minutes

Skills Practiced
Missing addend tens