TASK DEFINITION: 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.
PROBLEM: Sally found 9 seashells, Tom found 7 seashells, and Jessica found 5seashells on the beach. How many seashells did they find together?

SOLUTION: 21.0

PROBLEM: There are 3 short trees and 6 tall trees currently in the park. Parkworkers will plant 9 short trees today. How many short trees will thepark have when the workers are finished?

SOLUTION: 12.0

PROBLEM: It snowed 0.32 inches on Monday and 0.18 inches on Tuesday. Howmuch did it snow on Monday and Tuesday combined?

SOLUTION:
0.5