Round 51 to the nearest ten., 50, 60, 40, 30, Round 37 to the nearest ten., 50, 30, 40, 70, Round 56 to the nearest ten, 60, 50, 40, 70, Round 77 to the nearest ten., 40, 60, 70, 80, Round 23 to the nearest ten., 15, 20, 30, 40, Round 61 to the nearest ten., 80, 70, 50, 60, Round 33 to the nearest ten., 50, 40, 30, 20, Round 89 to the nearest ten., 90, 80, 100, 70, Round 55 to the nearest ten., 50, 70, 60, 40, Round 34 to the nearest ten., 30, 40, 50, 60, Round 72 to the nearest ten., 70, 60, 20, 80, Round 57 to the nearest ten., 50, 60, 70, 40

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