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Mr.Ruiz writes the expression 5x(2+1)2 / 3 on the board. Chelsea says the first step evaluate 12. Explain Chelsea’s mistake. Then, evaluate the question.

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Answer: Her mistake is that she is doing PEDMAS wrong.

Step-by-step explanation:

In PEDMAS, the first step would be to do the parentheses or groupings. However, Chelsea went straight to step two- exponents.

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