# Adding and Subtracting Unlike Fractions - PowerPoint PPT Presentation

The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
Title:

## Adding and Subtracting Unlike Fractions

Description:

### Section 4.5 Adding and Subtracting Unlike Fractions Adding or Subtracting Unlike Fractions Step 1. Find the LCD of the denominators of the fractions. – PowerPoint PPT presentation

Number of Views:13
Avg rating:3.0/5.0
Slides: 9
Provided by: Martin669
Category:
Tags:
Transcript and Presenter's Notes

Title: Adding and Subtracting Unlike Fractions

1
Section 4.5
2
• Step 1. Find the LCD of the denominators of the
fractions.
• Step 2. Write each fraction as an equivalent
fraction whose denominator is the LCD.
• Step 3. Add or subtract the like fractions.
• Step 4. Write the sum or difference in simplest
form.

Martin-Gay, Prealgebra, 5ed
3
Step 1 Find the LCD of 9 and 12.
Step 2 Rewrite equivalent fractions with the
LCD.
Martin-Gay, Prealgebra, 5ed
4
Step 4 Write the sum in simplest form.
Martin-Gay, Prealgebra, 5ed
5
Writing Fractions in Order
One important application of the least common
denominator is to use the LCD to help order or
compare fractions.
The LCD for these fractions is 35.
Write each fraction as an equivalent fraction
with a denominator of 35.
Martin-Gay, Prealgebra, 5ed
6
Writing Fractions in Order . . .
Compare the numerators of the equivalent
fractions.
Martin-Gay, Prealgebra, 5ed
7
Evaluating Expressions Given Fractional
Replacement Values
x - y
Martin-Gay, Prealgebra, 5ed
8
Solving Equations Containing Fractions
Martin-Gay, Prealgebra, 5ed