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.

Ex Input:
Jason grew 23 watermelons and 18 turnips. Nancy grew 28watermelons. How many watermelons did they grow in total?

Ex Output:
51.0

Ex Input:
Tim had 7 quarters and 9 nickels in his bank. His dad gave him 3nickels and 5 pennies. How many nickels does Tim have now?

Ex Output:
12.0

Ex Input:
Nancy grew 6 potatoes. Sandy grew 7 potatoes. How many potatoesdid they grow in total?

Ex Output:
13.0