# Introduction to Fractions Part 4

Taught by muchomath
• Currently 4.0/5 Stars.
5463 views | 2 ratings
Part of video series
Meets NCTM Standards:
Lesson Summary:

In this lesson, Professor Perez finishes his introduction to fractions series by explaining how to find the lowest common denominator in order to add or subtract fractions with different denominators. By using examples and step-by-step instructions, he shows how to write each fraction with the same denominator and then perform the arithmetic. With practice, students can improve their skills in adding and subtracting fractions efficiently.

Lesson Description:

The fourth part of the introductory series on fractions.

Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.

Questions answered by this video:
• How do you find lowest common denominators of fractions without a number line?
• What is the LCD of 2/3 and 3/2?
• How do you add and subtract fractions with different denominators?
• How can you use common denominators to add and subtract fractions?
• What is the LCM of 2, 3, and 4?
• Where can I find adding and subtracting fraction practice problems?
• #### Staff Review

• Currently 4.0/5 Stars.
This final installment in the fractions series explains how to find the lowest common denominator without using a number line. Several problems are explained step by step. This is another very good fractions video for a pre-Algebra student or any student having trouble and needing a review of fractions.