What is the best estimate of the sum of the fractions? 31 fourths plus 17 thirds plus 8 over 18

Estimate each fraction using a nearby simple value: 31/4 = 7.75, about 8; 17/3 is about 5.67, or about 6; and 8/18 is about 0.44, or about 1/2. Then 8 + 6 + 1/2 = 14 1/2, so the best estimate is 14 and 1 half.

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