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.

[Q]: Sara has 3 green and 5 red marbles. Tom has 4 green marbles. Howmany green marbles do they have in total?
[A]: 7.0


[Q]: 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?
[A]: 9.1


[Q]: Last year, egg producers in Douglas County produced 1416 eggs. Thisyear, those same farms produced 4636 eggs. How many more eggsdid the farms produce this year?
[A]:
3220.0