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.

[EX Q]: Professor Ellison weighed 2 pieces of metal for an experiment. Thepiece of iron weighed 11.16 pounds and the piece ofaluminum weighed 0.86 pound. How much moredid the piece of iron weigh than the piece of aluminum?
[EX A]: 10.3

[EX Q]: There are 11 rulers and 34 crayons in the drawer. Tim placed 14rulers in the drawer. How many rulers are now there in all?
[EX A]: 25.0

[EX Q]: A construction company bought 5.91 tons of gravel and 8.19 tons ofsand. How many tons of material did the company buy in all?
[EX A]:
14.1