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]: Alyssa's dog had puppies. She gave 7 to her friends. She now has 5puppies. How many puppies did she have to start with?
[EX A]: 12.0

[EX Q]: Jenny ran 0.6 mile and walked 0.4 mile. How much farther did Jennyrun than walk?
[EX A]:
0.2