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.

Example Input: Sam has 16 blue and 25 green balloons. Alyssa has 21 blue balloons.How many blue balloons do they have in all?
Example Output: 37.0

Example Input: Kendra made punch for her friend's birthday party. She used 0.25 gallon of grape juice, 0.35 gallon of cranberry juice, and 0.2 gallon of club soda. How many gallons of punch did Kendra make?
Example Output: 0.8

Example Input: Mike went to 15 basketball games this year, but missed 41. He wentto 39 games last year. How many basketball games did Mike go to intotal?
Example Output:
54.0

