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: Sally grew 6 carrots. Fred grew 4 carrots. How many carrots did theygrow in all?
Example Output: 10.0

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: Karen added 0.25 cup of walnuts to a batch of trail mix. Later, sheadded 0.25 cup of almonds. How many cups of nuts did Karen put inthe trail mix in all?
Example Output:
0.5