Summary
Math Antics finds the least common denominator to keep fractions as small as possible. A clear, animated 5-minute lesson you can drop straight into a grade 5 math block -- pause-friendly, with worked examples on screen.
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All ages
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Teaching resources
Discussion questions
Discussion
A few questions to talk through after watching “Common Denominator (LCD).”
- What is the least common denominator?
- How is the LCD related to the least common multiple?
- Why is using the LCD nicer than any common denominator?
Quick work-a-long
Vocabulary: least common denominator, multiple, equivalent, denominator.
Try it: Find the LCD of 1/6 and 1/4 and rewrite both fractions.