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Playlist: 3rd Math Operations

Broken Calculator: 2-Digit Addition

This calculator adds two-digit numbers wrong, the same way every time. Crack the rule, then predict its next mistake.

Broken Calculator: 2-Digit Subtraction

This calculator gets subtraction wrong the same way every time. Can your students crack its broken rule?

Math Curiosity: Magic Triangles

Can you make each side of this triangle add up to 9 using the digits 1-6?