Here is an example of how to add and subtract a rational expression. Remember to read the lesson on this topic.

Basic steps to follow:

1. First understand that operations involving rational expressions follow the same procedures as working with fractions

2. Next to add or subtract rational expressions they need to have the same denominator; this may require you to find the LCD and rewrite each rational expression such that it contains the LCD

3. Lastly add the numerators and simplify the final expression

Important habits to master math:

1. write out all steps

2. be very neat

3. use pencil not pen

4. review your work as your go

5. make sure you know the basics like fractions, positive and negative numbers and order of operations