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: Fred had 7 dimes in his bank. His sister borrowed 3 of his dimes.How many dimes does Fred have now?

A: 4.0
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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
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Q: At a pizza party, Mason and his friends drank 2.6 bottles of lemon-lime soda and 3.8 bottles of cola. How much soda did they drink in all?

A:
6.4
****