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.

Tom purchased a Batman game for $13.60, and a Superman gamefor $5. Tom already owns 2 games. How much did Tom spend onvideo games?
18.6

Jason had Pokemon cards. He gave 9 to his friends. He now has 4Pokemon cards. How many Pokemon cards did he have to start with?
13.0

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?
11.0