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.

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


[Q]: There are 5 oak trees currently in the park. Park workers will plant 4oak trees today. How many oak trees will the park have when theworkers are finished?
[A]: 9.0


[Q]: Melanie picked 7 plums and 4 oranges from the orchard. She gave 3plums to Sam. How many plums does she have now?
[A]:
4.0


