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: Sara had 21 quarters in her bank. Her dad gave her 49 quarters. Howmany quarters does she have now?

A: 70.0
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Q: Pamela bought 9.8 ounces of sugar, and she spilled 5.2 ounces of iton the floor. How much is?

A: 4.6
****
Q: There are 2 maple trees and 5 popular trees currently in the park.Park workers will plant 9 maple trees today. How many maple treeswill the park have when the workers are finished?

A:
11.0
****