1. Slide 1 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Linear Measurement Section9.4

2. Slide 2 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting U.S. System Units of Length U.S. Units of Length 12 inches (in.) = 1 foot (ft) 3 feet = 1 yard (yd) 36 inches = 1 yard 5280 feet = 1 mile (mi)

3. Slide 3 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting U.S. System Units of Length Unit Fractions (since 12 in. = 1 ft) (since 3ft = 1 yd) (since 5280 ft = 1 mi)

4. Slide 4 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 84 inches to feet.

5. Slide 5 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 10 feet to yards.

6. Slide 6 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert: 100 ft = ____ yd ____ ft

7. Slide 7 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Add 5 ft 8 in. + 6 ft 7 in.

8. Slide 8 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Subtract 24 ft 8 in. – 16 ft 3 in.

9. Slide 9 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Multiply 15 yd 1 ft by 8.

10. Slide 10 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting Metric System Units of Length Metric Units of Length 1 kilometer (km) = 1000 meters (m) 1 hectometer (hm) = 100 m 1 dekameter (dam) = 10 m 1 meter = 1m 1 decimeter (dm) = 1/10 or 0.1 m 1 centimeter (cm) = 1/100 m or 0.01 m 1 millimeter (mm) = 1/1000 or 0.001 m

11. Slide 11 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Defining and Converting Metric System Units of Length A millimeter is about the thickness of a large paper clip. A centimeter is about the width of a large paper clip. A meter is slightly longer than a yard. A kilometer is two-thirds of a mile.

12. Slide 12 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 2.5 m to millimeters. List the units of length in order from left to right and move from millimeters to meters. km hm dam m dm cm mm Move the decimal point three units to the right. 2.5 m = 2500 mm 3 units to the right

13. Slide 13 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Convert 450,000 mm to meters. List the units of length in order from left to right and move from millimeters to meters. km hm dam m dm cm mm Move the decimal point three units to the left. 450,000 mm = 450.000 m or 450 m 3 units to the left

14. Slide 14 Copyright © 2015, 2011, 2008 Pearson Education, Inc. Example Add 30 cm + 8.9 m.