Brkich
Notes - 2.1 – Compare Rational Numbers
PLO:
demonstrate an understanding of rational numbers by
- comparing and ordering rational numbers
- solving problems that involve arithmetic operations on rational numbers
a number that can be expressed as
Rational Number:
and , where a and b are integers
0
Example 1: Compare and order rational numbers
Compare and put in order the following rational numbers.
-1.2
0. 5
Method 1: place the rational numbers on a number line
-2
-1
0
1
2
Method 2: rewrite all the numbers in the same form – fraction or decimal
As a Fraction
2.2
Math 9
2
2
10
2
1
5
As a Decimal
2.2
4
5
4
5
0.8
7
8
7
8
0.875
0. 5
5
9
0. 5
7
8
7
8
0.875
2.1 – Compare Rational Numbers
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Brkich
Example 2: Compare rational Numbers
Which fraction is greater?
Method 1: Equivalent Fractions
Method 2: Decimals
0.75
-2
0. 6
-1
0
1
2
Example 3: Identify a Rational number between two given rational numbers
Identify a fraction between: -0.6 and -0.7
-0.7
-0.6
-0.5
-0.4
-0.3
One decimal number between -0.6 and -0.7 is -0.65
Convert to fractions:
Assign pg. 51, #1−4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 23
If done early - Math Link – Integer card game on pg. 54
Math 9
2.1 – Compare Rational Numbers
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