Question

−3.1+(−0.35) Write your answer as a decimal.

Answer 1

The answer is -3.45, because you add the negatives together. 

Answer 2

Okay. You're adding a negative number, which means you're subtracting. Add the numbers. 3.1 + 0.35 is 3.45. Now, put the negative sign back into the number. With that, the sum is -3.45.