what is the sum of -356.1 + 258.6?\n-614.7\n-97.5\n97.5\n614.7

Explanation:

Step1: Perform addition of signed - numbers

$-356.1 + 258.6=-(356.1 - 258.6)$

Step2: Calculate the value inside the parentheses

$356.1-258.6 = 97.5$

Step3: Apply the negative sign

$-(356.1 - 258.6)=-97.5$

Answer:

-97.5