1. Adding and Subtracting fractions Logan Chappell

2. Content Area: Mathematics Grade Level: 4 th Summary: The purpose of this PowerPoint is to show how to demonstrate like fractions with the same denominator and also different denominators. Also simply add or subtract the sum of the problem. Learning Objective: Given a equation the student will accurately add or subtract them together, with 100% accuracy. Content Standard: Numbers and fractions. Accomplishment: To have a understanding about adding and subtracting fractions. Sources: http://www.math.com/school/subject1/lessons/S1U4L3GL.html. http://www.coolmath4kids.com/fractions/fractions-12-adding- subtracting-different-denominators-01.html. http://www.brainpop.co.uk/uk/maths/numberandcalculation/addinga ndsubtractingfractions/preview.weml http://www.math.com/school/subject1/lessons/S1U4L3GL.html http://www.coolmath4kids.com/fractions/fractions-12-adding- subtracting-different-denominators-01.html http://www.brainpop.co.uk/uk/maths/numberandcalculation/addinga ndsubtractingfractions/preview.weml

3. Adding Fractions

4. When adding fractions, you have to make sure the denominators are the same. Both of the bottom numbers are 5. So in that case just add the two top numbers up and bring down the five. The answer would be 4/5.

5. Example

6. Subtracting Fractions with different denominators

7. Subtracting with different denominators Before you can subtract the fractions with different denominators, you must first find equivalent fractions with the same denominator, Secondly, find the smallest multiple of both numbers also called the LCM Rewrite the fraction with the LCM as the denominator. And that will be your answer

8. Example

9. Try this quiz 1..2. 3\7 + 6\7

11. Practice Links http://www.coolmath4kids.com/0-arithmetic- help-lessons-practice.html http://www.coolmath4kids.com/0-arithmetic- help-lessons-practice.html http://www.brainpop.com/math/numbersand operations/addingandsubtractingfractions/pre view.weml http://www.brainpop.com/math/numbersand operations/addingandsubtractingfractions/pre view.weml http://www.mathsisfun.com/fractions_subtra ction.html http://www.mathsisfun.com/fractions_subtra ction.html

12. Conclusion We have reviewed adding fractions with the same denominator. Also subtracting with different denominators. Having to find the LCM of the fraction. Keep practicing fractions and they will be so easy to you that you can do them in a blink of a eye.