1. Do Now
Fraction W.S.
DWP #3

2. 9/12/2013 SS-5 Measurement

3. Metric system - used almost everywhere in the world
- Its advantage over the customary system related to decimals

4. Kilometer
Meter
Decimeter
Centimeter
Millimeter
Unit
Width of a single bed
1 m m
Distance around a city block
1,000 m km
Width of CD case
0.1 m dm
Width of a fingernail
0.01 m cm
Thickness of a dime
0.001 m mm
Benchmark
Relation to a Meter
Abbreviation
Metric Units of Length

5. Example 1
What unit of measure provides the best estimate? Justify your answer.
A. A ballpoint pen is about 14 _____ long.
A ballpoint pen is about 14 cm long.
B. A football field is about 100 _____ long.
A football field is about 100 m long.

6. Example 2
A. A loaf of bread is about 3 _____ long.
B. An earthworm is about 5 _____ long.
A loaf of bread is about 3 dm long.
An earthworm is about 5 cm long.

7. The line is between 3 and 4 meters. Closer to 4 m than 3 m.
Example 7
Use the ruler to measure the length of the line to the nearest centimeter.
1 m
The line is between 3 and 4 meters. Closer to 4 m than 3 m.
The length of the line is about 4 m.

8. The line is between 1 and 2 meters. Closer to 1 m than 2 m.
Example 8
1 m
The line is between 1 and 2 meters. Closer to 1 m than 2 m.
The length of the line is about 1 m.

9. Your Turn!

10. Name the most appropriate unit of measure.
1. A door knob has a diameter of about 7 _____.
2. A ballpoint pen weighs about 3 _____.
3. A gallon of milk is almost 4 _____.
4. Paul estimated the weight of his infant sister to t be 5 _____. cm g L kg

11. Customary Units

12. Customary system- the measurement system often used in the United States
-includes units of measurement for length, weight, and capacity.

13. Customary Units of Length
Four times around a track mi
Mile
Width of a classroom door yd
Yard
Distance from your elbow to your wrist ft
Foot
Width of your thumb
in.
Inch
Benchmark
Abbreviation
Unit
Customary Units of Length

14. Example 1
What unit of measure provides the best estimate?
A. A doorway is about 7 _____ high.
B. A calculator is about 6 _____ long.
A doorway is about 7 ft high.
A calculator is about 6 in. long.

15. Example 2
A. A 4-door sedan is about 5 _____ long.
B. A student’s desk is about 3 _____ long.
A 4-door sedan is about 5 yd long.
A student’s desk is about 3 ft long.

16. The line segment is closest to 1 in. 5 8
Example 7
Use the ruler to measure the length of the line segment to the nearest half, fourth, or eighth of an inch.
The line segment is closest to 1 in.
5 8
The length of the line segment is about 1 in.
5 8

17. The line segment is between 1 and 1 in. 1 4 3 8
Example 8
The line segment is between 1 and 1 in.
1 4
3 8
The length of the line segment is closest to 1 in.
1 4

18. Your Turn!

19. What unit of measure provides the best estimate?
1. A row boat is 10 _____ long.
2. A skateboard is 30 _____ long.
3. A pair or earphones weighs 4 _____.
4. Drinking water is delivered in 5 _____ bottle.
5. Estimate the length of the line segment to the nearest half, fourth, or eighth of an inch. ft
in. oz
gal
2 in.

20. Homework
Pg. 18 #1-12 All
Study for Quiz Tomorrow

21. Measurement Scavenger Hunt