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Fraction W.S. DWP #3 Do Now

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9/12/2013 SS-5 Measurement

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

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Kilometer Meter Decimeter Centimeter Millimeter Unit Width of a single bed1 mm Distance around a city block 1,000 mkm Width of CD case0.1 mdm Width of a fingernail0.01 mcm Thickness of a dime0.001 mmm BenchmarkRelation to a Meter Abbreviation Metric Units of Length

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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. A football field is about 100 m long. B. A football field is about 100 _____ long.

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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.

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Example 7 Use the ruler to measure the length of the line to the nearest centimeter. The line is between 3 and 4 meters. Closer to 4 m than 3 m. The length of the line is about 4 m m 2

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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. 1 m 23 4

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Your Turn!

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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 _____. g cm L kg

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Customary Units

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

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Four times around a trackmiMile Width of a classroom doorydYard Distance from your elbow to your wristftFoot Width of your thumbin.Inch BenchmarkAbbreviationUnit Customary Units of Length

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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.

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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.

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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 The line segment is closest to 1 in The length of the line segment is about 1 in. 5858

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1 2 The line segment is between 1 and 1 in The length of the line segment is closest to 1 in Example 8

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Your Turn!

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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. in. ft oz gal 2 in. 1 2

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

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Measurement Scavenger Hunt

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