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OpenStudy (anonymous):
Estimate the answer by rounding. 84 - 18
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pooja195 (pooja195):
84 minus 18 is equal to 66, when rounded it would be 70
OpenStudy (anonymous):
you can't subtract?
OpenStudy (anonymous):
Or you could also round 84 to 80 and 18 to 20. 80 - 20 = 60
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