Unit 4, Lesson 5
Compare and Order Decimals in Different Notations
Grade 4
Activity 2
Long Jumps
American athlete Carl Lewis won 10 Olympic medals and 10 World Championships in track and field— 100-meter dash, 200-meter dash, and long jump.
Here are some long jump records from his career.| year | distance (meters) |
|---|---|
| 1979 | 8.13 |
| 1980 | 8.35 |
| 1982 | 8.7 |
| 1983 | 8.79 |
| 1984 | 8.24 |
| 1987 | 8.6 |
| 1991 | 8.87 |
- On this list, which distance is his shortest jump? Which is his longest jump?
-
Here are the top distances, in meters, of 3 other American long jumpers.
- Bob Beamon:
- Jarrion Lawson:
- Mike Powell:
- Bob Beamon:
Student Section Summary
We learned to express tenths and hundredths in decimal notation, locate them on a number line, and compare them.
We learned
The table shows some more examples of tenths and hundredths in decimal notation.
- Because
and are equivalent, 0.5 and 0.50 are also equivalent. - Likewise,
and are equivalent, so 1.7 and 1.70 are also equivalent.
| fraction | decimal notation |
|---|---|
| 0.04 | |
| 0.23 | |
| 0.5 | |
| 0.50 | |
| 1.7 | |
| 1.70 |
Numbers in decimal notation can be located on a number line to help compare them.
Example:
The decimal 0.24 is equivalent to
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