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PPT – Introduction to Fractions PowerPoint presentation | free to view - id: 78ada6-YWMyN

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Introduction to Fractions

- By Graeme Henchel

http//hench-maths.wikispaces.com

Index

- What is a fraction?
- Mixed Numbers method 1
- Mixed Numbers method 2
- Equivalent Fractions
- Special form of one Why
- Special form of one
- Finding equivalent fractions
- Adding Common denominators
- Adding Different denominators
- Common denominators 1
- Common denominators 2
- ½1/3 with diagram
- 1/31/4 with diagram
- ½ 2/5 with diagram

- 3/72/3 No diagram
- Adding Mixed Numbers
- Multiplying Fractions
- Multiplying Mixed Numbers 1
- Multiplying Mixed numbers 2
- Multiplying Mixed diagram
- Dividing Fractions
- Fraction Flowchart .ppt
- Fraction Flowchart .doc
- Decimal Fractions
- Fractionlt-gtDecimallt-gt

What is a Fraction?

A fraction is formed by dividing a whole into a

number of parts

Im the NUMERATOR. I tell you the number of parts

Im the DENOMINATOR. I tell you the name of part

Mixed numbers to improper fractions

Convert whole numbers to thirds

Mixed number

Improper fraction

Another Way to change Mixed Numbers to improper

fractions

In short 5x3217

Since 5/51 there are 5 fifths in each whole. So

3 wholes will have 3x515 fifths. Plus the 2

fifths already there makes a total of 15217

fifths

Equivalent fractions

An equivalent fraction is one that has the same

value and position on the number line but has a

different denominator

Equivalent fractions can be found by multiplying

by a special form of 1

Multiplying By a Special Form of One

Why does it work?

- Multiplying any number by 1 does not change the

value 4x14, 9x19 . - Any number divided by itself 1.

Multiplying a fraction by a special form of one

changes the numerator and the denominator but

DOES NOT CHANGE THE VALUE

1

Finding equivalent fractions

Convert 5ths to 20ths

Thats 4 so I must multiply by

What do we multiply 5 by to get a product of 20?

Special form of 1

Simplifying Fractions Cancelling

- Simplifying means finding an equivalent fraction

with the LOWEST denominator by making a special

form of 1 equal to 1

1

Another way of doing this