1000-100-18050为什么不等于540

The expression (1000-100)-180/50% is not equal to 540 because the division operation should be performed before the subtraction operation.

Let's break down the expression step by step:

1. First, calculate 180 divided by 50% (which is equivalent to dividing by 0.5): 180 / 0.5 = 360

2. Now, subtract 100 from 1000: 1000 - 100 = 900

3. Finally, subtract 360 from 900: 900 - 360 = 540

So, the correct answer is indeed 540.