Calculators, Patterns, and Multiplying By Decimals

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Numbers and Operations →

Summary

Before teaching students the procedure for multiplying with decimals, how much can they intuitively glean from a structured play session with calculators?

  1. Students multiply 15 times 100, 10, 1, 0.1, and 0.01 and then predict the product of 15 × 0.001. They look for a pattern.
  2. Using the same idea from step one, students work with multiplying by 0.02 and 0.05. They're honing their pattern from step one.
  3. Finally, students practice predicting decimal multiplication problems and checking with their calculators.

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