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]: A restaurant made 9 hamburgers to serve during lunch. Only 3 wereactually served. How many hamburgers were over from lunch?
[A]: 6.0


[Q]: While taking inventory at her pastry shop, Kelly realizes that she had 0.4 box of baking powder yesterday, but the supply is now down to 0.3 box. How much more baking powder did Kelly have yesterday?
[A]: 0.1


[Q]: Sara picked 35 pears and 27 apples from the orchard. She gave 28pears to Dan. How many pears does Sara have?
[A]:
7.0