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.

Kaleen filled a bucket with 0.8 gallon of water. A few minutes later,she realized only 0.5 gallon of water remained. How much water had leaked out of the bucket?
0.3

On a hot day, Sam poured 1 bucket of water into a plastic wadingpool. A few minutes later he added another 8.8 buckets. How muchwater did Sam pour into the pool?
9.8

Melanie had 10 quarters and 17 pennies in her bank. Her dad gaveher 27 pennies and her mother gave her 19 pennies. How manypennies does Melanie have now?

63.0