1. Adding and Subtracting Fractions
Objective:
Learn how to add and subtract fractions.

2. Adding and Subtracting Fractions with the same denominator:
Steps:
1. Add or Subtract the numerators.
2. Write the sum or difference over the denominator.
3. Rewrite in simplest form.
Example: = 4
10 = 2 5

3. Adding and Subtracting Fractions with different denominator:
Steps:
Find the LCD (Least common denominator) of the 2 denominators.
Rewrite the fractions using the common denominator.
Add or Subtract.
Rewrite fraction in simplest form.
If the answer is an improper fraction you must convert it to a mixed number.

4. 6 × 2_= 12 ___________________ 1 12 4 x3 6 x2 3 - 2 = 1 12 12 12
Example: =
First, find the least common multiple of the 2 denominators. 4= 4, 8, 12, 16… = 6, 12, 18…
Then we can do it 2 ways, vertically or horizontally:
Vertically:
1 × _3__
4 × 3_= 12 -
1 × _2_
6 × 2_= 12 ___________________ 1 12
Horizontally:
1 x x2 =
4 x x2
= 1

5. Your Examples: