Where Does the Decimal Point Go?

Generalize from Repetitions

Opening

Generalize from Repetitions

Watch the video that shows Jan and Carlos using a general rule that they developed after seeing something happen over and over again.

  • What do you think Jan noticed over and over again as she solved decimal multiplication problems?
  • How did this repetition help her come up with her general rule?
  • How did Jan justify that her rule works?
  • Do you think Jan’s rule works?

VIDEO: Mathematical Practice 8

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