Cross-Reducing (Example)

The video tutorial demonstrates how to solve a multiplication problem involving fractions using the cross-reducing method. It begins by identifying common factors between numerators and denominators of different fractions to simplify them. The tutorial then shows how to multiply the simplified fractions and verify that the result is in its simplest form.

What is the first step in cross reducing when multiplying fractions?

• Divide the fractions by each other.

• Multiply the numerators together.

• Circle the numerators and denominators to find common factors.

• Add the fractions together.

Which common factor is used to reduce the numbers 6 and 9 in the example?

• 4

• 3

• 2

• 5

After reducing, what is the new expression before multiplying the fractions?

• 2/7 times 4/3

• 2/9 times 4/7

• 3/7 times 4/3

• 6/7 times 3/9

What is the product of the fractions 2/7 and 4/3?

• 8/27

• 6/21

• 8/21

• 12/21

How do you verify that the fraction 8/21 is in its simplest form?

• Ensure there are no common factors other than 1.

• Multiply both numbers by 3.

• Divide both numbers by 2.

• Check if both numbers are even.