Math Arguments

Problems, Questions, and Puzzles to spark discussion and argument in the maths classroom.

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Item 693

Two-Button Calculator

A calculator, initially displaying 0, has two buttons: + adds one to the number on display; x multiplies number on display by ten. What is the least number of button presses needed to show 5034?




How do you know that was the fewest number of operations?


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James Tanton
LOGIC

Source: James Tanton
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