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Do Now. Fraction W.S. DWP # 3. 9 /12/2013 SS-5 Measurement. M etric system - used almost everywhere in the world - Its advantage over the customary system related to decimals. Metric Units of Length. Unit. Abbreviation. Relation to a Meter. Benchmark. Millimeter.
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Do Now Fraction W.S. DWP #3
Metric system- used almost everywhere in the world - Its advantage over the customary system related to decimals
Metric Units of Length Unit Abbreviation Relation to a Meter Benchmark Millimeter mm 0.001 m Thickness of a dime Centimeter cm 0.01 m Width of a fingernail Decimeter dm 0.1 m Width of CD case Meter m 1 m Width of a single bed Kilometer km 1,000 m Distance around a city block
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.
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.
1 m 2 Example 7 Use the ruler to measure the length of the line to the nearest centimeter. 3 4 The line is between 3 and 4 meters. Closer to 4 m than 3 m. The length of the line is about 4 m.
1 m 2 3 4 Example 8 The line is between 1 and 2 meters. Closer to 1 m than 2 m. The length of the line is about 1 m.
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
Customary system-the measurement system often used in the United States -includes units of measurement for length, weight, and capacity.
Customary Units of Length Unit Abbreviation Benchmark Inch in. Width of your thumb Foot ft Distance from your elbow to your wrist Yard yd Width of a classroom door Mile mi Four times around a track
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.
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.
1 2 5 8 The line segment is closest to 1 in. 5 8 The length of the line segment is about 1 in. Example 7 Use the ruler to measure the length of the line segment to the nearest half, fourth, or eighth of an inch.
1 2 1 4 3 8 The line segment is between 1 and 1 in. 1 4 The length of the line segment is closest to 1 in. Example 8
1 2 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.
Homework • Pg. 18 #1-12 All • Study for Quiz Tomorrow