Isabella thinks of a number. "If I double my number and add 2 the answer is 40"
Isabelle thinks of a number. "If I multiply my number by 2 and add 6 the answer is 40"
Isaiah thinks of a number. "If I add 2 to my number then divide the result by 2, the answer is 2"
Jack thinks of a number. "If I multiply my number by 4 and subtract 2 then multiply the result by 5, the answer is 4 less than 154"
What numbers are they thinking about?
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Note to teacher: Doing this activity once with a class helps students develop strategies. It is only when they do this activity a second time that they will have the opportunity to practise those strategies. That is when the learning is consolidated. Click the button above to regenerate another version of this starter from random numbers.
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