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018 Calculator Puzzles

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Teacher Notes


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Activity OutcomeReading, writing and saying large whole numbers. Calculator
MTS Set MTS6
NATIONAL Curriculum The Number System
Topics Understand Whole Numbers
Calculator
Keywords Large Numbers, Integers, Calculator
GroupingIndependent
ResourcesCalculator each
Lesson Notes
  • Tell students to write down the number they start with in each puzzle.
  • Students follow the steps to change their number on the calculator.
  • Share start numbers and solutions: "In the first puzzle I started with 9901. What number did I get on my screen?" (Students listening use mental computation and/or calculator to find the solution.)
  • Ask students to make up similar puzzles that others can solve.
ReflectionsAsk: Can these problems be solved more efficiently with or without a calculator? Can adults solve these problems mentally? How can we test to find out?...
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AnswersAnswers will vary