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A) 12 5/6 + 3 5/18 = 77/6 + 59/18 = (231+59)/18 = 290/18 = 16 2/18 = 16 1/9 b) 8 3/25 - 3 1/3 = 203/25 - 10/3 = (609-250)/75 = 359/75 = 4 59/75 c) 6 3/5 - 4 = 33/5 - 4 = (33-20)/5 = 13/5 = 2 3/5 d) 5 1/8 * 8 = 41/8 * 8 = 41