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Adding and Subtracting Fractions

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by

Abigail Walker

on 8 October 2014

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Transcript of Adding and Subtracting Fractions

Adding Improper Fraction
Step 1. Find the LCD

Step 2. Find out the equivalent fraction using the LCD

Step 3. Add the numerators together

Step 4. Simplify into mixed number
How to Subtract Improper Fraction
Step 1. Find a common denominator

Step 2. Subtract

Step 3. Simplify
How to Add a Proper Fraction
How to Add a Mixed Number
What do we already know?
Improper fractions
Mixed numbers
Adding and Subtracting Fractions

Devin, Abby, Tariq and Breanna

How to Subtract a Proper Fraction
How to Subtract a Mixed number
Step 1. Change

Step 2. Find a common denominator

Step 3. Subtract the numerators

Step 4. Simplify
Examples
Step 1. Find the LCD

Step 2. Find out the equivalent fraction using the LCD

Step 3. Add the numerators together

Step 4. Simplify (if needed)

To add a fraction with the same denominator you just add the numerators and keep the same denominator.

Examples
18/24 + 5/8= ?
7/21+ 9/3= ?
Example
5/10-17/30=?
15/24-1/8=?
Examples
Do the same thing except subtract at the end instead of adding
Step 1. Find the LCD

Step 2. Find out the equivalent fraction using the LCD

Step 3. Add the numerators together

Step 4. Add the whole numbers together

Step 5. Simplify (if needed)

Examples

8 1/3+11 3/6=?
2 1/8+11 1/2=?
6 3/4 - 5 1/2=?



4 3/5 - 2 8/15=?
Examples
10/4+7/4=?
5/4+20/8=?
9/7-16/14=?




4/3-13/12=?
Full transcript