Add fractions with unlike denominators
The idea
Find a common multiple of the two denominators.
Step by step
- Find a common multiple of the two denominators.
- Multiply the numerator and denominator of each fraction by the same factor to use that common denominator.
- Add the numerators, keep the common denominator, then simplify and check the size of the answer.
Example
Find + 1/3. Give the answer in simplest form.
Answer
Use denominator 6: + = = 5/6.
Start quiz5 questions
5 questionsTry it together
Use fraction strips to model + 1/3. Rename both in sixths and connect the picture to the calculation.
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