2­4 Comparing and Ordering Fractions.notebook
2-4 Comparing and Ordering Fractions
There are two ways to compare fractions
• Cross Product method
• Common Denominator method (use LCM)
The cross product method is useful when comparing
two fractions
( , )
The common denominator method is useful when ordering
three or more fractions (
, , )
A. Cross Product method: Compare the fractions. Be
sure to record each product. Write <,>, or = in the
blank.
1.)
2.)
November 06, 2013
2­4 Comparing and Ordering Fractions.notebook
November 06, 2013
Cross Product method continued.
Compare using
>, < , =
2.) 1.) 3.)
B. Common Denominator method (use LCM)
Ex- Write the fractions
greatest.
,
,
in order from least to
• Find the LCM of the denominators (12, 8, 24)
12:
8:
24:
• Rewrite each faction using the LCD as the denominator
=
=
=
Least __________________________________ Greatest
2­4 Comparing and Ordering Fractions.notebook
Common Denominator method continued.
Order the following fractions from least to greatest.
1.)
Least __________________________________ Greatest
2.)
,
,
Least __________________________________ Greatest
November 06, 2013
2­4 Comparing and Ordering Fractions.notebook
November 06, 2013
Demonstrate Understanding:
1.) Compare:
,
2.) Order from least to greatest:
,
Least __________________________________ Greatest
3.) Order from least to greatest:
,
,
Least __________________________________ Greatest