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]: There are 115 pencils in the drawer. Sara placed 100 pencils in thedrawer. How many pencils are now there in all?
[EX A]: 215.0

[EX Q]: There are 107 walnut trees currently in the park. Park workers willplant 104 walnut trees today. How many walnut trees will the parkhave when the workers are finished?
[EX A]: 211.0

[EX Q]: Jason picked 46 pears, Keith picked 47 pears, and Mike picked 12pears from the pear tree. How many pears were picked in total?
[EX A]:
105.0