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.

Example Input: Each day, the polar bear at Richmond's zoo eats 0.2 bucket of troutand 0.4 bucket of salmon. How many buckets of fish does the polarbear eat daily?
Example Output: 0.6

Example Input: Milford Lake was originally blue because it only had 809 algae plants.Now there are 3263 algae plants, and the lake has turned green.How many more algae plants are in Milford Lake now?
Example Output: 2454.0

Example Input: 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?
Example Output:
13.0