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.

Alyssa bought some toys. She bought a football for $5.71, and spent $6.59 on marbles. In total, how much did Alyssa spend on toys?
12.3

Last year, 90171 people were born in a country, and 16320 peopleimmigrated to it. How many new people began living in the countrylast year?
106491.0

There are 31 short trees and 32 tall trees currently in the park. Parkworkers will plant short trees today. When the workers are finishedthere will be 95 short trees in the park. How many short trees did theworkers plant today?

64.0