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Addition and Subtraction of Fractions

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You would think to subtract the numerators but you cannot: 1/3 - 2/3 ... http://www.fortunecity.com/skyscraper/dos/1232/graphiclinks.html. The End. Correct ... – PowerPoint PPT presentation

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Title: Addition and Subtraction of Fractions


1
Addition and Subtraction of Fractions
  • By Charatie Waldrep

2
This is how its done
  • 2 1 3 or 1
  • 3 3 3

3
How to subtract
  • 2 - 1 1
  • 3 3 3

4
  • 2 1 3 or 1
  • 3 3 3
  • Add the numerators only. Keep the dominator the
    same.
  • 2 1 3
  • 3 3 3

5
  • Subtract the numerators and keep the denominator
    the same.

2 - 1 1 3 3 3
6
If
  • 11/3 - 2/3
  • You would think to subtract the numerators but
    you cannot
  • 1/3 - 2/3 ?
  • Then you must regroup.4/3 is the same as
    1 1/3.
  • 4/3 - 2/3 1/3

7
Regrouping
  • In order to regroup, you must multiply the whole
    number by the denominator and then add the
    numerator.
  • 1 1/3 1 x 3 3
  • 3 1 4
  • Then put the denominator under what the result
    is. 4/3 This is also known as around
    the world multiplying.

8
Quiz Time
9
  • 1. ¼ ¾ ???
  • 2/3

4/4
4/3
1/2
Next
10
  • 2. 11/3 - 2/3 ???
  • 6/3 1/3
  • 2/3 3/3

Next
11
  • 2/5 1/5 ???
  • 1/5 1 1/3
  • 4/5 3/5

Next
12
What is regrouping with fractions also known as?
  • Using fractions in everyday life
  • Around the world multiplying
  • Butterfly multiplying
  • Long division

13
Works Cited
  • Library Clip Art http//www.jefftech.net/library3
    03.html
  • Kids Domain http//www.kidsdomain.com/clip/index.
    html
  • Absolute Web Graphics Archive http//www.grsites.
    com/webgraphics/
  • Clipart Backgrounds http//www.edselect.com/cli
    part.htm

14
Continued Works Cited
  • Shelby County Schools - sample web graphics
    http//www.shelbyed.k12.al.us/webintr2awm.html
  • Teacher Files http//www.teacherfiles.com/clip_ar
    t.htm
  • The Teachers Parking Lothttp//www.fortunecity.c
    om/skyscraper/dos/1232/graphiclinks.html

15
The End
16
Correct
17
Sorry, try again!
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