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Mastering Basic Metric System Conversions

Learn about SI and U.S. Customary Systems, basic units, converting units, advantages of the metric system, metric prefixes, and examples for changing units within the Metric System. Enhance your measurement skills with easy-to-follow methods.

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Mastering Basic Metric System Conversions

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  1. Section 8.1Basic Terms and Conversions Within the Metric System

  2. What You Will Learn • SI System • U.S. Customary System • Basic Units • How to convert form one unit to another

  3. SI System and U.S. Customary System • Most countries of the world use the Systéme international d’unités or SI system. • The SI system is referred to as the metric system in the United States. • Two systems of weights and measures exist side by side in the United States today, U.S customary system and the metric system.

  4. Advantages to Using the Metric System • The metric system is the worldwide accepted standard measurement system. • There is only one basic unit of measurement for each physical quantity. • The SI system is based on the number 10, allowing less need for fractions.

  5. Basic Terms Metric Term Abbrev Common Use Comparison to Customary meter m length a little more than a yard kilogram kg mass about 2.2 pounds liter l volume a little more than a quart

  6. Metric Prefixes Prefix Symbol Meaning kilo k 1000 × base unit hecto h 100 × base unit deka da 10 × base unit base unit deci d 1/10 of base unit centi c 1/100 of base unit milli m 1/1000 of base unit

  7. Changing Units within the Metric System • To change from a smaller unit to a larger unit move the decimal point in the original quantity one place to the left for each larger unit of measure until you obtain the desired unit of measure.

  8. Changing Units within the Metric System • To change from a larger unit to a smaller unit, move the decimal point in the original quantity one place to the right for each smaller unit of measure until you obtain the desired unit of measure.

  9. Changing Units within the Metric System

  10. Example 1: Changing Units Convert 293.7 m to km. Solution Meters is a smaller unit than km. Move the decimal 3 places to the left, 293.7 m = 0.29376 km.

  11. Example 1: Changing Units Convert 14 g to cg. Solution Gram is a larger unit than centigram. Move the decimal point 2 places to the right 14 g = 1400 cg

  12. Example 1: Changing Units • Convert 0.76 l to ml. Solution • Liter is a larger unit than milliliter. Move the decimal point 3 places to the right, • 0.76 l= 760 ml

  13. Example 1: Changing Units • Convert 240 dal to kl. Solution • Decaliter is a smaller unit than kiloliter. Move the decimal point 2 places to the left, • 240 dal = 24.0 kl

  14. Example 2: Two More Conversions Convert 502 mm to hectometers. Solution Millimeter is a smaller unit than hectometer. Move the decimal point 5 places to the left, 502 mm = 0.00502 hm

  15. Example 2: Two More Conversions Convert 6.34 dam to decimeters. Solution Dekameter is a larger unit than decimeter. Move the decimal point 2 places to the right, 6.34 dam = 634 dm

  16. Example 4: Comparing Lengths Arrange in order from smallest to largest lengths: 3.4 m, 3421 mm, and 104 cm. Solution Convert all lengths to mm 3.4 m = 3400 mm 3421 mm 104 cm = 1040 mm From smallest to largest: 104 cm, 3.4 m, 3421 mm

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