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 construction company bought 5.91 tons of gravel and 8.19 tons ofsand. How many tons of material did the company buy in all?
[EX A]: 14.1

[EX Q]: There are 43 maple trees and 22 orange trees currently in the park.Park workers will plant maple trees today. When the workers arefinished there will be 54 maple trees in the park. How many mapletrees did the workers plant today?
[EX A]: 11.0

[EX Q]: Fred has 709 green balloons, he gave Sandy 221 of the balloons.How many green balloons does he now have?
[EX A]:
488.0