Fractions - PowerPoint PPT Presentation

Loading...

PPT – Fractions PowerPoint presentation | free to view - id: 1df040-MWRmN



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Fractions

Description:

Fractions. Simplest Form. Equivalent Fractions. There can be more than one fraction that represents the same value. ... test works with this fraction. ... – PowerPoint PPT presentation

Number of Views:102
Avg rating:3.0/5.0
Slides: 10
Provided by: patrick375
Category:

less

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

Title: Fractions


1
Fractions
  • Simplest Form

2
Equivalent Fractions
  • There can be more than one fraction that
    represents the same value.
  • 2/3 4/6 8/12

3
Fractions in Simplest Form
  • A fraction is in simplest form when it can no
    longer be reduced,
  • or
  • its numerator and denominator have the greatest
    common factor of 1.

4
Reducing Fractions
  • One strategy to use for reducing fractions is to
    use the divisibility tests.
  • If the numerator and denominator both pass the
    same divisibility test, then it can be reduced by
    that number.

5
Divisibility Tests
  • 2 Is the number an even number ?
  • 3 Do all the digits add up to a number
    divisible by 3 ?
  • 4 Is the number made by the last two digits
    divisible by 4 ?
  • 5 Is the ones digit a 5 or 0 ?
  • 6 Is the number even and divisible by 3 ?
  • 9 Do all the digits add up to a number
    divisible by 9 ?
  • 10 Is the ones digit a 0 ?

6
Divisibility Test Method
  • 14/16

The numerator and denominator are both even
numbers.
7/8
So it can be reduced by 2
The numerator and denominator both pass the 3
divisibility test.
9/21
3/7
So it can be reduced by 3
7
Divisibility Tests Cont.
  • Sometimes you may have to use the divisibility
    test more than one time to get to the simplest
    form of the fraction.

27/36
The 3 divisibility test works with this fraction.
9/12
The 3 divisibility test will work again on this
fraction.
3/4
8
Factoring Method
  • Find and list all the factors for the numerator.
  • Find and list all the factors for the
    denominator.
  • Identify what the Greatest Common Factor is.
  • Divide both the numerator and denominator by this
    Greatest Common Factor.

9
Factoring Method Cont.
  • 12/18

Factors of 18 1 x 18 2 x 9 3 x 6 6 x 3 1
, 2 , 3 , 6 , 18
Factors of 12 1 x 12 2 x 6 3 x 4 4 x 3 1
, 2 , 3 , 4 , 6 , 12
12 6
2
or 2/3
18 6
3
About PowerShow.com