LCD/LCM SF/GCF -MATH

AFTER SOLVING ADDITION OR SUBTRACTION OF FRACTIONS-ALL ANSWERS MUST BE IN SIMPLEST FORM!

How do you find Simplest Form? Find your GCF (Greatest Common Factor) See example below:

Your fraction is 3/12 You want to find the simplest form:

Step 1: Find your GCF by listing the factors for your numerator 3 and your denominator 12

3-1,3

12-1,2,3,4,6,12

GCF= 3

Step 2: Now take your GCF and divide the numerator and the denominator by the GCF.

3/12 divided by 3/3=1/4

Solution: 3/12 in simplest form = 1/4 Viola!

WHAT DO YOU DO WHEN YOU WANT TO ADD OR SUBTRACT FRACTIONS WITH DIFFERENT (UNLIKE) DENOMINATORS?

You may not add or subtract fractions without first finding their LCD (lowest common denominator). They must have the same denominator in order for you to add or subtract them.

How do you find your LCD? By finding your LCM (lowest common multiple)

Here's how:

Example 3/4 + 3/6

Step One: Take the two denominators 4 and 6 and list all their multiples until you find the LCM

4-4,8,12