You are provided with an arithmetic question. Your task is to compute the solution using the given arithmetic operations. The only arithmetic operators needed to answer the questions are'+'(addition) and'-'(subtraction). The answer should be correct to one decimal place.

Roadster's Paving Company used 10 tons of cement to pave Lexi'sstreet and 5.1 tons of cement to pave Tess's street. How muchcement did Roadster's Paving Company use in all?
15.1