Parentheses: How big of a change can they make!?

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Once students understand the order of operations, they often just get stuck doing increasingly difficult practice problems. That's a sure-fire way to squelch learning, though. Here, students determine where to place parentheses to make the greatest change in an expression.

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Related CCSS Math Standards

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Grade 5 5.OA.1 
Grade 6 6.EE.1