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 found 2 seashells and Keith found 5 seashells on the beach.When they cleaned them, they discovered that 9 were cracked. Howmany seashells did they find together?
[A]: 7.0


[Q]: While making pastries, a bakery used 0.2 bag of wheat flour and 0.1 bag of white flour. How many bags of flour did the bakery use in all?
[A]: 0.3


[Q]: Joan had 5 dimes in her bank. She spent 2 of her dimes. How manydimes does she have now?
[A]:
3.0