Definition/Procedure Example Use Unit Fractions to Convert Between Units We can use unit fractions and the relationships between metric units to convert from one unit to another. (p. 449) Use unit fractions to convert 27 km to meters. 27 km 1000 m 1 km 27 km 1 1000 m 1 km Divide out the unit of kilometers. 27,000 m 1 Multiply. 27,000 m Simplify. Therefore, 27 km 27,000 m. Use the Metric Conversion Chart to Convert Between Units This is how to use the metric conversion chart to convert from one unit to another: 1) Find the unit that you are given. 2) Count the number of places you must move to go from the unit you are given to the unit you want to get. 3) Move the decimal point the same number of places and in the same direction that you did on the metric conversion chart. (p. 450) Use the metric conversion chart to change 45 cm to meters. Find cm on the chart. Since we move two places to the left to reach m, we move the decimal point in 45 cm two places to the left to change to meters. Remember that the whole number 45 can be written with a decimal point to the right of the 5. 45. cm .45 m Put the decimal point at Move the decimal point the end of the number. two places to the left. So, 45 cm 0.45 m. 7.3 The Metric System: Capacity and Weight (Mass) Units of Capacity Units of capacity measure quantities of liquids. In the United States, we use units such as quarts and gallons. In the metric system, the basic unit of capacity is the liter, abbreviated as L. A liter is a little more than a quart. (p. 455) PASTEURIZED 1 Quart xxxxxxxxxx xxx xxx xxx xxx xxx xxx xxx ________________ xxxxx xxx xxxxx ___________ xx xx ___________ xx xx ___________ xx xx ___________ xx xx ___________ xx xx ___________ xx xx ___________ xx xx ___________ 1 Liter To describe larger and smaller units of capacity in the metric system, we use the same prefi xes on liter that we used for meter to describe length. The units used most often are liter and milliliter. (p. 456) 1 kiloliter (kL) 1000 liters (L) 1000 milliliters (mL) 1 liter (L) 484 CHAPTER 7 Measurement and Conversion www.mhhe.com/messersmith
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