Multiplying Fractions
Learn how to multiply fractions using cross-cancelling, including mixed numbers. Let's get started! 🚀

Video Lesson
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Flashcards
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🛎️ How Do We Multiply Fractions?
- Multiply the numerators together and multiply the denominators together.
- Then simplify the fraction, if possible.
🛎️ What Is Cross-Cancelling When Multiplying Fractions?
- You can simplify first by cross-cancelling a numerator with a denominator.
- Cross-cancelling makes the numbers smaller and easier to multiply.
🛎️ How Do We Multiply a Fraction by a Whole Number?
- Write the whole number as a fraction over 1.
- Then multiply as you would with two fractions.
🛎️ How Do We Multiply Mixed Numbers?
- Convert mixed numbers into improper fractions first.
- Then multiply and simplify the final answer.
Practice Questions
Test your understanding
What is ?
Correct! 🎉 +10 pointsNot quite right
Multiply the numerators: . Then, multiply the denominators: . The result is , which cannot be simplified further.
What is of 15?
Correct! 🎉 +10 pointsNot quite right
Multiply by rewriting 15 as . Cross-cancel 5 and 15 to get 1 and 3. Multiply 7 by 3 to get 21.
What is ?
Correct! 🎉 +20 pointsNot quite right
Simplify to and to . Multiply the numerators: . Multiply the denominators: . The result is .
What is ?
Correct! 🎉 +20 pointsNot quite right
Simplify: 16 and 24 divide by 8, becoming 2 and 3, and 18 and 27 divide by 9, becoming 2 and 3. Multiply: and , giving .
What is using the cross-cancelling method?
Correct! 🎉 +20 pointsNot quite right
Simplify: 25 and 50 divide by 25, becoming 1 and 2, and 40 and 32 divide by 8, becoming 5 and 4. Multiply: and , giving , which simplifies to .
What is using the cross-cancelling method?
Correct! 🎉 +30 pointsNot quite right
Convert into an improper fraction: . Cross-cancel: 9 and 3 divide by 3, becoming 3 and 1. Multiply: and , giving .
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Interactive Activity
Master cross-cancellation across different formats
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