OML Search

Adding Fractions with Unlike Denominators

Related Topics:
More Lessons for Grade 4 Math
Math Worksheets



 

Videos, solutions, examples and songs to help Grade 4 students learn how to add fractions with unlike denominators.

Addition of fractions with unlike denominators
Examples:
1. Add 5/12 + 1/6
2. The Pacific Ocean covers 1/3 of the Earth's surface. The Atlantic Ocean covers 1/5 of the Earth's surface. What fraction of the Earth's surface is covered by both the Atlantic and Pacific Ocean?
How to add fractions with unlike denominators?
Step 1: Line the fractions up vertically.
Step 2: Find the LCD (least common denominator) which is the LCM (least common multiple) of all the denominators.
Step 3: Write the fractions with the same denominator which will be the LCD.
Step 4: Add the numerators of the new fractions.
Step 5: Simplify the fractions when necessary.
Example:
1/4 + 1/3
Adding 3 Fractions with Uncommon Denominators
Step 1: Change all fractions to have a common denominator
Step 2: Add the numerators while keeping the same denominator.
Step 3: Reduce when possible.
Example:
1/12 + 1/8 + 10/16



Adding Fractions Song for Kids | Finding the Least Common Denominator
Lyrics:
Find the least common multiple - that's the first action.
Next is finding equivalent fractions.
Then do the addition or subtraction.
Simplify is the automatic reaction.
Visually adding fractions with unlike denominators
Example:
5/6 + 1/4
Adding Fractions with Different Denominators
Example:
3/5 + 1/6
12/27 + 2/9


Rotate to landscape screen format on a mobile phone or small tablet to use the Mathway widget, a free math problem solver that answers your questions with step-by-step explanations.


You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.


OML Search


We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.


[?] Subscribe To This Site

XML RSS
follow us in feedly
Add to My Yahoo!
Add to My MSN
Subscribe with Bloglines