(27 x 3) - (10 x 3) = 17 x 3 = 51
9
27
9(9 + 3) = (9 x 9) + (3 x 9) = 12 x 9 = 108
(7 x 9) + (9 x 9) = 16 x 9 = 144
81 minus 86 = -5
136 minus 81 is 55.
29 minus 81 is -52.
if u minus 59 from 81 you get 22
18/27 minus 44/81 is 10/81
81 - 15 = 66
81 - 78 = 3
81 - 49 = 32