The steps for adding fractions can be very easy if the problem is set up properly. The fraction worksheets on this page have examples of problems that illustrate increasing levels of difficulty to build the skills needed to tackle any kind of fraction addition problem.
Long Division. There are different methods for dividing multi-digit numbers (long division). One way is a combination of estimation/ trial and error and multiplication. There is also a commonly used algorithmic method that is well explained and illustrated here at mathisfun.com.