Multiplying and Reducing Fractions

Mr. Walker introduces a math lesson on multiplying non-unit fractions. The lesson reviews previous concepts of multiplying unit fractions and progresses to non-unit fractions. Various strategies are discussed, including the area model, straight multiplication, and reducing fractions before multiplying. Examples are provided to illustrate these methods, and the lesson concludes with a summary and additional resources for further learning.

What is a unit fraction?

• A fraction with a numerator of one

• A fraction with a denominator of one

• A fraction with equal numerator and denominator

• A fraction with a numerator greater than the denominator

Tags

CCSS.5.NF.A.1

CCSS.5.NF.A.2

What is the main goal of today's lesson?

• To subtract unit fractions

• To multiply non-unit fractions by non-unit fractions

• To divide non-unit fractions

• To add unit fractions

Tags

CCSS.5.NF.B.5B

Which model can be used to visualize the multiplication of fractions?

• Volume model

• Area model

• Line model

• Point model

Tags

CCSS.5.NF.B.6

When multiplying fractions directly, what do you multiply?

• Only the numerators

• Only the denominators

• Neither numerators nor denominators

• Both numerators and denominators

Tags

CCSS.5.NF.B.6

What is the result of multiplying 2/3 by 3/4 using direct multiplication?

• 1/2

• 6/12

• 2/4

• 3/6

Tags

CCSS.5.NF.B.6

What is the benefit of reducing fractions before multiplying?

• It increases the final fraction

• It makes the numbers larger

• It simplifies the calculation

• It makes the process longer

How can you simplify the fraction 6/12?

• Divide both by 4

• Divide both by 6

• Divide both by 3

• Divide both by 2

What is the simplified form of 21/63?

• 7/21

• 3/9

• 1/3

• 2/6

Tags

CCSS.5.NF.B.6

What is the first step in reducing fractions before multiplying?

• Add the numerators

• Subtract the denominators

• Look for common factors

• Multiply the fractions

Tags

CCSS.5.NF.B.6

What is the result of reducing 7/9 and 3/7 before multiplying?

• 1/3

• 1/2

• 1/7

• 1/9

Tags

CCSS.5.NF.B.6