1. Introduction to Fractions
By Graeme Henchel

2. Index 3/7+2/3 No diagram Adding Mixed Numbers Multiplying Fractions
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
½+1/3 with diagram
1/3+1/4 with diagram
½ +2/5 with diagram
3/7+2/3 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
Fraction<->Decimal<-> %

3. What is a Fraction?
A fraction is formed by dividing a whole into a number of parts
I’m the NUMERATOR. I tell you the number of parts
I’m the DENOMINATOR. I tell you the name of part

4. Mixed numbers to improper fractions
Convert whole numbers to thirds
Mixed number
Improper fraction

5. Another Way to change Mixed Numbers to improper fractions
In short
5x3+2=17
Since 5/5=1 there are 5 fifths in each whole.
So 3 wholes will have 3x5=15 fifths.
Plus the 2 fifths already there makes a total of
15+2=17 fifths

6. 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

7. Multiplying By a Special Form of One
Why does it work?
Multiplying any number by 1 does not change the value 4x1=4, 9x1=9 ……….
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

8. 1

9. Finding equivalent fractions
Convert 5ths to 20ths
That’s 4 so I must multiply by
What do we multiply 5 by to get a product of 20?
Special form of 1

10. 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