Transcript 2.7 Comparing and Ordering Decimals

4.2
Comparing
and Ordering
Decimals
Review
•How do we compare numbers
• < Less Than
•> Greater Than
•= Equal to
•We look at place value
•How do we order numbers
• decide if we are ordering greatest to least or least
to greatest
•Compare two numbers at a time
•Place in proper order
Quick Practice
•LEFT Hand
 LESS THAN <
=
<>
•RIGHT
HAND

GREATER
THAN
>
One million ____ 1,000,000
12,435
____
12,345
1000
____
1,001
•BOTH HANDS  EQUAL TO =
Both
Hands
Right
Hand
Left
Hand
Why are decimals different?
What is larger?
0.1 – One Tenth or 0.01 One Hundredth
Why are they SO Tricky
0.1
0.09
0.84
0.0555
6.7
>
______
>
______
=
______
<
______
<
______
0.0999999
0.001
0.84000000
0.5
7.1
Steps for Comparing Decimals
1)Line up numbers by place value (Decimal
Dave)
2) Start at the LEFT and find the place
where the digits are different
3) Compare those digits
4) Put in proper symbol <, > or =
Steps for Ordering Decimals
1)Compare the numbers two
at a time
2) List them from greatest to
least or least to greatest
1)
2) Order from Least
to Greatest
<
0.890 _________ 0.9 0.6
0.07
3) Order from
Greatest to least
0.4
4.44
4.4
4.4
0.044
0.4
0.66
6.7
0.6
0.07
0.66 6.7
4)
4.44
0.044
=
0.2000 ________ 0.2