Making Sense of the Algorithm

This Making Sense of the Algorithm lesson plan also includes:

Deepen young mathematicians' understanding of place value with a lesson on the subtraction algorithm. Presented with a series of multi-digit subtraction problems involving regrouping, learners use expanded notation to explain how the minuend should be rearranged in order to carry out the operation.

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CCSS: Designed
Instructional Ideas

  • Complete the the included worksheet one problem at a time, allowing children to work on them with a partner or small group before discussing their answers as a whole class
Classroom Considerations

  • Prior to teaching this lesson, ensure students are comfortable with representing numbers in expanded notation

  • Includes extension and intervention ideas for differentiating the lesson

  • None
Common Core