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: Mary had 7 nickels in her bank. Her dad gave her 5 nickels. Howmany nickels does Mary have now?

A: 12.0
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Q: Sandy grew 6 carrots. Sam grew 3 carrots. How many carrots didthey grow in total?

A: 9.0
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Q: A chef bought 0.12 kilograms of almonds and 0.38 kilograms of pecans. How many kilograms of nuts did the chef buy in all?

A:
0.5
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