instruction:
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.
question:
Ron weighed 2 colored metal balls during a science class. The blue ball weighed 6 pounds and the brown ball weighed 3.1 pounds. If Ron places both balls on the scale at the same time, what will thescale read?
answer:
9.1


question:
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?
answer:
12.3


question:
There are 115 pencils in the drawer. Sara placed 100 pencils in thedrawer. How many pencils are now there in all?
answer:

215.0