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Mathematics 18 Online
OpenStudy (anonymous):

Peyton solved this multiplication problem. 37 × 15 555 Which expression could Peyton use to check his work? A. 37 ÷ 13 B. 555 × 37 C. 555 ÷ 15 D. 555 × 15

OpenStudy (ccswims):

C, the inverse of multiplication is division, and to check your work you either plug in your answers, or do the inverse operation (which is what we do now)

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