A = 137.454 + 206
A = 137.(453+1) + 206
A = 137.453 + 137 + 206
A = 137.453 + (137 + 206)
A = 137.453 + 343
B = 453.138 - 110
B = 453.(137+1) - 110
B = 453.137 + 453 - 110
B = 453.137 + (453 - 110)
B = 453.137 + 343
Vì 453.137 + 343 = 453.137 + 343
=> A = B