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.

Melanie had 7 dimes in her bank. Her dad gave her 8 dimes and hermother gave her 4 dimes. How many dimes does Melanie have now?
19.0

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

Tom went to 4 hockey games this year, but missed 7. He went to 9games last year. How many hockey games did Tom go to in all?

13.0