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.
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Question: Alyssa picked 25 limes and Mike picked 32 limes. Tom picked 12plums. How many limes were picked in all?

Answer: 57.0


Question: Kenji and his classmates placed colored blocks on a scale during ascience lab. The yellow block weighed 0.6 pounds and the greenblock weighed 0.4 pounds. How much more did the yellow blockweigh than the green block?

Answer: 0.2


Question: Tim has 22 books. Mike has 20 books. How many books do they havetogether?

Answer:
42.0