Detailed Instructions: 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: Jason grew 23 watermelons and 18 turnips. Nancy grew 28watermelons. How many watermelons did they grow in total?
A:
51.0