Sectieoverzicht
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To add fractions the denominators of the fractions must be the same.
Example
\( \frac{1}{4} + \frac{2}{4}=\frac{3}{4} \) because the denominators are both \(4\) you can simply add the numerators.
In the next video the method of adding fractions is explained using a worked example.-
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Finding the lowest common denominator
To add or subtract fractions with different denominators, you must find the lowest common denominator (LCD) sometimes also called the lowest common multiple (LCM).
To add fractions with different denominators you must:
- Find the lowest common denominator (LCD).
- Rewrite each fraction into an equivalent form using the LCD.
- Add the numerators of fractions, keeping the LCD as the denominator.
- Simplify the final answer if needed.
After you have watched the video try the next activity to test your knowledge. -
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