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.

Sally grew 6 carrots. Fred grew 4 carrots. How many carrots did theygrow in all?
10.0

Tom purchased a Batman game for $13.60, and a Superman gamefor $5. Tom already owns 2 games. How much did Tom spend onvideo games?
18.6

Sara has 31 red and 15 green balloons. Sandy has 24 red balloons.How many red balloons do they have in total?

55.0