Examples, solutions, videos, and lessons to help students learn how to add fractions with like or unlike denominators.Related Topics:
When we add fractions that have the same, or common denominators, we add only the numerators. The denominators stay the same.
To add fractions with uncommon denominators, we need to change the fractions to equivalent fractions with common denominators before we find the sum.
First, we would need to find the least common denominator (LCD), which is the LCM of the denominators.
Next, we write equivalent fractions using the least common denominator. Then, we proceed to add as before.
Step 1 :Find the LCD or LCM of 2 and 5
Multiples of 2: 2, 4, 6, 8, 10, 12
Multiples of 5: 5, 10, 15
The LCD or the Least Common Multiple of 2 and 5 is 10
Step 2: Write both fractions and as equivalent fractions with a common denominator of 10.
Step 3: Add the 2 equivalent fractions.
The following video shows more examples of adding fractions with uncommon or unlike denominators.
Try the free Mathway calculator and
problem solver below to practice various math topics. Try the given examples, or type in your own
problem and check your answer with the step-by-step explanations.
We welcome your feedback, comments and questions about this site or page. Please submit your feedback or enquiries via our Feedback page.