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 45 seashells, Melanie found 23 seashells, and Jasonfound 32 seashells on the beach. When they cleaned them, theydiscovered that 31 were cracked. How many seashells did they findtogether?
[A]: 100.0


[Q]: Sara has 31 red and 15 green balloons. Sandy has 24 red balloons.How many red balloons do they have in total?
[A]: 55.0


[Q]: Sam had 7 pennies and 8 dimes in his bank. His sister borrowed 4dimes. How many dimes does Sam have now?
[A]:
4.0