0.3 + 5 + 2.89 = 0.3 + 2.89 + 5
15 + (75 + 82) = (15 + 75) + 82
17 + 2.7 + 18 = 2.7 + 17 + 18
56.5 + 32.8 = 56.5 + 38.2 + 0
8.3 + 5.5 + 0.7 = 14.5