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Josh used 3/7 x 21 as a compatible number estimate for 3/7 x 20. Is his estimate reasonable? Why or why not?
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Josh used 3/7 x 21 as a compatible number estimate for 3/7 x 20. Is his estimate reasonable? Why or why not?

User MenyT
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yes, because if you estimate 21 you will get 20. 20 is reasonable.
User Mithgroth
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