# Elementary Algebra Q15 | Pierce College math assessment sample MDTP | Summary and Q&A

845 views
July 4, 2015
by
blackpenredpen
Elementary Algebra Q15 | Pierce College math assessment sample MDTP

## TL;DR

This video explains the process of finding the lowest common denominator (LCD) for adding algebra fractions.

## Install to Summarize YouTube Videos and Get Transcripts

### Q: Why is it important for fractions to have the same denominator when adding or subtracting?

When adding or subtracting fractions, it is necessary to have the same denominator to ensure accurate calculations. Otherwise, the fractions cannot be combined directly.

### Q: How do you find the lowest common denominator (LCD)?

To find the LCD, you factor out the denominators of the fractions. Identify any common factors and multiply them together to obtain the LCD.

### Q: Can all denominators be factored?

No, some denominators, especially in algebra fractions, cannot be factored. In such cases, you need to multiply the denominators together to find the LCD.

### Q: How do you change the fractions to have the LCD as the denominator?

To change the fractions, you need to multiply both the numerator and the denominator by the appropriate factor(s) to obtain the LCD as the new denominator.

## Summary & Key Takeaways

• The video explains the importance of having the same denominator when adding or subtracting fractions.

• The process of finding the lowest common denominator (LCD) is demonstrated using examples.

• The video shows how to apply the LCD concept to add algebra fractions.