E.g. 1 1/2, 2 3/2 <-- WRONG!!
1. Deal with the fractions first. If they have a common denominator, go ahead. But if they have a different denominator, find a common denominator.
2. Then deal with the whole numbers.
3. Finally, combine the fractions and the whole denominators.
4. And if you can, bring the fraction to its lowest terms
Here's a little test for you:
1 1/2 + 3 3/4 = ?
Figure it out