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.

Jessica spent $10.2 on a cat toy, and a cage cost her $11.7. What was the total cost of Jessica's purchases?
21.9

Mike picked 7 apples, Nancy picked 3 apples, and Keith picked 6apples and 4 pears, at the farm. How many apples were picked intotal?
16.0

Sally grew 113 turnips and 118 pumpkins. Mary grew 129 turnips.How many turnips did they grow in total?

242.0

