71 = 60 + 11 --> 71 - 60 = 11 85 = 70 + 15 --> 85 - 70 = 15 92 = 80 + 12 --> 92 - 80 = 12
79 = 60 + __ --> 79 - 60 = __ 83 = 70 + __ --> 83 - 70 = __ 46 = 30 + __ --> 46 - 30 = __ 55 = 40 + __ --> 55 - 40 = __