Unit 4, Lesson 4
Compare and Order Decimals
Grade 4
Warm-up
Estimation Exploration: Eagle Wingspan
The person in the image is 1.7 meters tall.
Estimate the wingspan of the eagle in meters.
Record an estimate that is:
| too low | about right | too high |
|---|---|---|
Activity 1
All in Order
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Order the numbers from least to greatest. Use the number line if it is helpful.
1.08
0.08
0.80
0.9
0.45
0.54
-
Order the numbers from greatest to least. Use the number line if it is helpful.
1.25
0.95
0.4
0.09
12.05
0.25
Activity 2
400-Meter Dash in a Flash
The table shows 8 of the top runners in the Women’s 400-Meter event. Here are the running times that put them in the world’s top 25 for this event.
48.37
49.3
48.7
49.26
49.07
49.28
48.83
49.05
The names in the table are arranged in order by the fastest running times. The fastest runner is at the top.
| runner | time (seconds) | year achieved |
|---|---|---|
| Shaunae Miller-Uibo (Bahamas) | 2019 | |
| Sanya Richards (U.S.A.) | 2006 | |
| Valerie Brisco-Hooks (U.S.A.) | 1984 | |
| Chandra Cheesborough (U.S.A.) | 1984 | |
| Tonique Williams-Darling (Bahamas) | 2004 | |
| Allyson Felix (U.S.A.) | 2015 | |
| Pauline Davis (Bahamas) | 1996 | |
| Lorraine Fenton (Jamaica) | 2002 |
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Put the running times in order, from least to greatest, to match each time with the runner.
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How many seconds did it take Sanya Richards to run 400 meters?
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What is Allyson Felix’s running time?
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