Dividing Fractions with Common Denominators

The video tutorial explains how to divide fractions with common denominators. It begins with an introduction to the concept and provides three detailed examples: dividing 8/9 by 2/9, 7/9 by 3/9, and 13/10 by 2/10. Each example is demonstrated using models and highlights the 'numerator trick' for simplifying the process. The lesson concludes with a summary of the key points and a preview of the next lesson on dividing fractions without common denominators.

What is the first step in dividing fractions with common denominators?

• Subtract the denominators

• Ask how many groups of the divisor fit into the dividend

• Find the reciprocal of the divisor

• Multiply the numerators

In the example 8/9 ÷ 2/9, how many groups of 2/9 fit into 8/9?

• 2

• 3

• 4

• 5

What is the result of 8/9 divided by 2/9?

• 4

• 5

• 2

• 3

In the example 7/9 ÷ 3/9, how many whole groups of 3/9 fit into 7/9?

• 3

• 4

• 1

• 2

What is the result of 7/9 divided by 3/9?

• 3 and 1/3

• 3

• 2 and 1/3

• 2

In the example 13/10 ÷ 2/10, how many whole groups of 2/10 fit into 13/10?

• 5

• 6

• 6 and 1/2

• 7

What is the result of 13/10 divided by 2/10?

• 7

• 5

• 6

• 6 and 1/2

What is the general rule for dividing fractions with the same denominator?

• a/b ÷ c/d = a/c

• a/b ÷ c/d = a/d

• a/c ÷ b/c = a/b

• a/c ÷ b/c = a/d

Using the general rule, what is 8/9 ÷ 2/9?

• 2

• 3

• 4

• 5

What will the next lesson cover?

• Subtracting fractions

• Adding fractions

• Dividing fractions with different denominators

• Multiplying fractions