Multiplying Fractions using Cancellation

This video tutorial teaches how to multiply fractions using cross cancellation. It covers four steps: identifying cross cancellation opportunities, multiplying numerators, multiplying denominators, and ensuring the result is in simplest form. The tutorial includes practice problems and a bonus problem involving three fractions.

What is the first step in multiplying fractions using cancellation?

• Multiply the numerators

• Cross cancel if possible

• Multiply the denominators

• Check if the fraction is in simplest form

When performing cross cancellation, what should you look for between a numerator and a denominator?

• If they are both prime numbers

• If they are both even numbers

• If they are equal

• If they share a common factor

After cross cancellation, what is the next step in multiplying fractions?

• Add the numerators

• Multiply the numerators

• Subtract the denominators

• Divide the numerators

In the practice problem 2/5 * 5/7, which numbers can be cross canceled?

• 5 and 5

• 2 and 7

• 2 and 5

• 5 and 7

What is the result of multiplying 4/7 and 2/5 without any cross cancellation?

• 4/35

• 8/7

• 2/35

• 8/35

In the problem 2/9 * 3/4, which numbers can be cross canceled?

• 2 and 4

• 3 and 9

• 2 and 9

• 3 and 4

What is the simplified result of multiplying 2/9 and 3/4 after cross cancellation?

• 1/12

• 3/8

• 2/12

• 1/6

In the bonus problem, which pair of numbers can be cross canceled first?

• 2 and 3

• 4 and 5

• 3 and 9

• 1 and 5

What is the final simplified result of the bonus problem 1/2 * 3/5 * 4/9?

• 4/15

• 3/10

• 1/15

• 2/15

Why is cross cancellation useful when multiplying fractions?

• It makes the numbers larger

• It simplifies the fractions before multiplying

• It changes the fractions to decimals

• It eliminates the need to multiply