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.

Input: Consider Input: Sara picked 35 pears and 27 apples from the orchard. She gave 28pears to Dan. How many pears does Sara have?

Output: 7.0

Input: Consider Input: There were 2 red orchids and 4 white orchids in the vase. Jessica cutsome red orchids from her flower garden. There are now 18 redorchids in the vase. How many red orchids did she cut?

Output: 16.0

Input: Consider Input: Mike found 6 seashells and 4 starfish, but 4 of the seashells werebroken. How many unbroken seashells did Mike find?
Output: 2.0