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# Sec. 2.1

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### Sec. 2.1

1. 1. What aspects of an object are measureable?<br />
2. 2. Learning Target:Students will learn how to measure length accurately using customary and metric units and estimating them using benchmarks. <br />
3. 3. Customary Units:inches (in.)foot (ft)yard (yd)mile (mi.)How they are related to one another:1ft = 12in. 1yd = 3ft = 36in.1mi. = 1,760yd = 5,280ft<br />
4. 4. Metric Units:millimeter (mm)centimeter (cm)meter (m)kilometer (km)How they are related to one another:1cm = 10mm 1m = 100cm = 1,000mm1km = 1,000m<br />
5. 5. Common measuring tools:foot rulercentimeter ruleryardstickmetersticktape measureHow many units on are each?<br />
6. 6. How many units on are each? foot ruler -12 inchescentimeter ruler – 30 centimetersyardstick – 3 footmeterstick – 100 centimeterstape measure – can vary but normally has both customary and metric units<br />
7. 7. Choose an appropriate measuring tool for the length. Explain your reasoning.1. Diameter of a circular pool.2. Diameter of a car tire.Common measuring tools:foot ruler centimeter ruleryardstick metersticktape measure<br />
8. 8. Answers: 1. Diameter of a circular pool.A tape measure; the pool’s diameter is greater than one yard an greater than one meter.2. Diameter of a car tire.Yardstick or meterstick; the tire’s diameter is greater than one foot and greater than 30 centimeters and less than one yard and less than one meter.<br />
9. 9. Measure the length of the spoon to the nearest inch.http://www.future-edge.com/blackboard/MathM3B211/images/spoon.jpg<br />