How to Add and Subtract Fractions - PowerPoint PPT Presentation

Loading...

PPT – How to Add and Subtract Fractions PowerPoint presentation | free to download - id: 74d650-NjlmM



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

How to Add and Subtract Fractions

Description:

How to Add and Subtract Fractions With Pizza! By Frank Wang Pizza You all love pizza, don t you? With pizza, you can learn a new math skill! – PowerPoint PPT presentation

Number of Views:85
Avg rating:3.0/5.0
Slides: 10
Provided by: 20f
Learn more at: http://rthomasfwes.wikispaces.com
Category:
Tags: add | fractions | math | subtract

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: How to Add and Subtract Fractions


1
How to Add and Subtract Fractions With Pizza!
  • By Frank Wang

2
Pizza
  • You all love pizza, dont you? With pizza, you
    can learn a new math skill! FRACTONS!

3
Do this
  • What is 1/3 plus ½? Lets try it with pizza.



1/3
1/2
5/6
4
Walkthrough
  • Lets go through that with the actual numbers now
    that you understand what to do with pizza. First,
    make the denominators the same. The only way to
    add and subtract fractions is to have the same
    denominator for both fractions.

1/3 2/6 (1x22, 3x26)
½3/6 (1x33, 2x36)
5
Walkthrough 2
  • Then, add the NUMERATORS and NOT the
    DENOMINATORS. This is because the denominators
    are how many pieces the whole is split into, and
    you arent splitting it up more.

2/6 3/6 5/6
6
Subtracting Fractions
  • Its the same with subtraction with fractions.
    Make the fractions have the same denominator and
    then subtract the numerators and keep the
    denominator.

½ - 1/3 ?
½ 3/6, 1/32/6
3-21, so the answer is 1/6
7
Review
  • Do you understand now? Good. Try this question.
  • 3/5 1/2

8
Answer
  • If you got 1/10, great job! If you got something
    different, here is how I got that.
  • 3/5 6/10 ½ 5/10
  • (3x26,5x210) (1x55, 2x510)
  • 6-51, so the answer is 1/10

9
Thank You for Participating!
  • EVERYTHING BY FRANK (except the methods)
About PowerShow.com