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Why Round?
Rounding makes numbers simpler. Instead of saying 'I have 47 marbles,' you can say 'about 50.' Rounding helps with quick mental math and checking answers.
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Mathematics — Rounding and Estimating
Rounding makes numbers simpler. Instead of saying 'I have 47 marbles,' you can say 'about 50.' Rounding helps with quick mental math and checking answers.