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2.2 – Rational Numbers
Definition
Any number that can be expressed as the ratio of two integers,
a
, where
b
b  0 , is called a rational number.
 There are three ways to write a negative rational number. You can write
“negative three fourths” as follows:

3
4
3
4
3
4
Example 1 – Show that each number can be written as the ratio of two
integers.
a. 7
c. 0.7
e.  5.7
b. 0
d. 81.54
f.  0.001
 There is a point on the number line for every rational number. The
number is called the coordinate of the point.
 The point is the graph of the number.
Example 2 – Graph each rational number.
a.
7
3
b. 
1
4
c. 1.6
Example 3 – Insert either < or > to make a true statement.
a. 0.5
0.1
b.  2.81
1.73
c.  7.3
 1.5
d.
7
5
9
5
e.
7
5
34
25
f. 
3
8

1
3
 Rational numbers are part of a larger set of numbers called the real
numbers.
L12 – pg 61 (1, 9, 13, 15 & 19-29 odd)