Definition:
Set of all numbers of the form q/p , where p and q are integers and q ≠ 0
Examples:
Is 2 a rational numbers ? Why?
Reducing fractions
Ex:
Mixed Numbers and Improper Fractions
What is a mixed numbers?
What is an improper fraction ?
How to convert a positive mixed number into an improper
fraction?
Examples
Convert into an
improper fraction.
Same with
How to convert a positive improper fraction to a mixed
number?
1. Divide the numerator by the denominator
2. The mixed number
Examples
Convert into a mixed
number
Convert into a mixed
number
Terminating versus repeating decimals
Rational numbers can be expressed as decimal numbers
either terminating or repeating.
Examples
Adding and subtracting fractions
NEED COMMON DENOMINATOR !!!!
Multiplying fractions :
Dividing fractions
Use the reciprocal
What is the reciprocal of a number ?
A number * its reciprocal always equal ……
Find the reciprocal of 1/3
Find the reciprocal of 4
General Rule for division of fractions: