69 - 54 : 3 + 6 = 69 - 18 + 6 = 57
69 - 54 : (3 + 6) = 69 - 54 : 9 = 69 - 6 = 63
(69 - 54) : 3 + 6 = 15 : 3 + 6 = 5 + 6 = 11
69 - 54 : 3 + 6 = 69 - (54 : 3) + 6 = 69 - 18 + 6 = 51 + 6 = 57
(69 - 54 : 3 + 6) = 69 - (18 - 6) = 69 - 12 = 57
69 - (54 : 3 + 6) = 69 - (18 + 6) = 69 - 24 = 45
69 - 54 : (3 + 6) = 69 - 54: 9 = 69 - 6 = 63
(69 - 54) : 3 + 6 = 15 : 3 + 6 = 5 + 6 = 11