Solve Subtraction Problems: Using Number Line

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Number lines are great visual tools that can be used to teach a wide range of math topics. The final video of this series models how to use number lines when solving subtraction problems using the counting up strategy. Pause the video after each example and encourage learners to share alternative solutions that involve the use of a number line. Use this resource in a unit on subtraction of large numbers and build the number sense of young mathematicians before introducing the standard subtraction algorithm.

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CCSS: Designed
Classroom Considerations

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Pros

  • Verbal and visual explanations support learners with using number lines to solve subtraction problems
  • Examples include subtraction of one-, two-, and three-digit numbers
  • Video content is available as a slide show
Cons

  • Requires an opportunity for learners to practice using number lines to solve subtraction problems
Common Core