Which expression best estimates 6 and 3 fourths divided by 1 2 thirds ?

The quotient is about 6.75 ÷ 1.67, which is close to 4. Estimating 6¾ as 7 and 1⅔ as 2 gives 7 ÷ 2, or 3.5, which is a reasonable estimate. So the best choice is “7 divided by 2.”

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