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.

[EX Q]: A restaurant served 6 cakes during lunch and 9 during dinner today.How many cakes were served today?
[EX A]: 15.0

[EX Q]: Pamela bought 9.8 ounces of sugar, and she spilled 5.2 ounces of iton the floor. How much is?
[EX A]: 4.6

[EX Q]: Marta picked 2 pumpkins. The first pumpkin weighed 4 pounds, andthe second pumpkin weighed 8.7 pounds. How much did the 2pumpkins weigh all together?
[EX A]:
12.7