Adding and Subtracting Fractions with Unlike Denominators

The video tutorial explains how to add and subtract fractions with unlike denominators. It begins with a review of adding fractions with like denominators, emphasizing that numerators are added while denominators remain unchanged. The tutorial then explores adding fractions with unlike denominators, demonstrating the need to find a common denominator by renaming fractions. An example is provided to illustrate the process. The video concludes with a similar approach to subtracting fractions with unlike denominators, highlighting the importance of equivalent fractions.

Why can't you add the denominators when adding fractions?

• Because the denominators are always the same.

• Because it makes the fractions larger.

• Because the numerators are more important.

• Because the denominators represent the total number of pieces in a whole.

What is the first step in adding fractions with different denominators?

• Add the numerators directly.

• Find a common denominator.

• Subtract the smaller fraction from the larger one.

• Multiply the fractions together.

In the example of adding 2/6 and 1/2, what is the common denominator used?

• 2

• 3

• 6

• 12

When subtracting 2/3 and 2/5, what is the common denominator found?

• 5

• 10

• 20

• 15

What is the result of subtracting 2/3 from 2/5 after finding a common denominator?

• 10/15

• 6/15

• 4/15

• 1/15