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.

Vince's bus ride to school is 0.725 mile and Zachary's bus ride is 0.525 mile. How much longer is Vince's bus ride than Zachary's?
0.2

Jason grew 32 watermelons and 22 cantelopes. Dan grew 31watermelons. How many watermelons did they grow in total?
63.0

Jason has 18 books and he has read 9 of them. Mary has 42 books.How many books do they have together?

60.0