Definition:
Adding two fractions together to get a fraction and then if posible to simplify




Summary:




How To:


Steps:

Find the Common Denominator

Unlike Denominators
1. Write the problem vertically by listing the multiples.
2.Write the common denominator next to the other fractions and change it to an equivalent fraction.
3.Add/Subtract the numerators together and keep the same denominator.
4.When the denominator is found, simplify if needed.

Same Denominators
1. Write the problem vertically.
2. Add/Subtract the numerators.
3. Write the fraction with the same denominators
.



Easy:
*2/5 + 3/4= 23/20 3/6 -2/6= 1/6


Medium:
*9/12 - 7/24= 11/24



Hard:
23/84-46/42


Pictures:
external image commondem.png
external image commondem.png

adding fractions [online image] www.freemathhelp.com 11/12/09




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