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4.2 Comparing and Ordering Decimals. How do we compare numbers < Less Than > Greater Than = Equal to We look at place value. Review. 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.

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Presentation Transcript
review

How do we compare numbers

    • < Less Than
    • > Greater Than
    • = Equal to
    • We look at place value

Review

  • 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 >
  • BOTH HANDS  EQUAL TO =

Quick Practice

1000 ____ 1,001

12,435 ____ 12,345

One million ____ 1,000,000

=

Both Hands

>

Right Hand

<

Left Hand

why are decimals different

What is larger?

0.1 – One Tenth or 0.01 One Hundredth

Why are decimals different?

why are they so tricky

>

0.1 ______ 0.0999999

0.09 ______ 0.001

0.84 ______ 0.84000000

0.0555 ______ 0.5

6.7 ______ 7.1

Why are they SO Tricky

>

=

<

<

steps for comparing decimals

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 Comparing Decimals

steps for ordering decimals

Compare the numbers two at a time

2) List them from greatest to least or least to greatest

Steps for Ordering Decimals

slide8

1)

0.890 _________ 0.9

2) Order from Least to Greatest

0.6 0.66 6.7 0.07

<

0.07 0.6 0.66 6.7

3) Order from Greatest to least

0.4 4.4 0.044 4.44

4)

0.2000 ________ 0.2

=

4.44 4.4 0.4 0.044