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.

[EX Q]: Joan found 79 seashells on the beach, she gave Mike 63 of theseashells. How many seashells does she now have?
[EX A]: 16.0

[EX Q]: Mike picked 7 apples, Nancy picked 3 apples, and Keith picked 6apples and 4 pears, at the farm. How many apples were picked intotal?
[EX A]: 16.0

[EX Q]: A restaurant made 9 hamburgers and 4 hot dogs to serve during lunch. Only 3 hamburgers were actually served. How many hamburgerswere over?
[EX A]:
6.0