Final answer:
To simplify the expression 2.5 – 3.1 – 3.86 + 2.7 – 4.01, add and subtract the numbers in the expression to get -5.77.
Step-by-step explanation:
To simplify the expression 2.5 – 3.1 – 3.86 + 2.7 – 4.01, we need to add and subtract the numbers in the expression.
Step 1: 2.5 - 3.1 = -0.6
Step 2: -0.6 – 3.86 = -4.46
Step 3: -4.46 + 2.7 = -1.76
Step 4: -1.76 – 4.01 = -5.77
Therefore, the simplified expression is -5.77.