what is 1and 1/3 + 2 and 1/2, 3 and 5/6, 2 and 4/6, 3 and 3/6, 5 and 2/7, three numbers with mean median and range 13, 6.8,15,18.2, 4.9, 8.1,4, 5.7, 19,17.3, 6.5, 13, 19.5, 88 times 1.56 (no calculator), 141.13, 137.28, 156.83, 182.92, what is 7/9 + 1/18 - 2/3, 1/6, 5/16, 2/9, 9/13.

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