1 GRAM = HOW MANY MILLIGRAMS?

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1 1 GRAM = HOW MANY MILLIGRAMS? (1) Take the 1-gram expression and place the decimal point in the proper place. 1 gram is the same as 1.0 gram (decimal point in place) (2) Move that decimal point three places to the right. Note that as the decimal point is moved, you must add zeros to mark each movement. 1.0 gram = = 1,000 milligrams (after converting, you remove the decimal point if no digits follow it.) 1.5 GRAMS = HOW MANY MILLIGRAMS? (1) The 1.5-gram expression has the decimal point already in place. (2) Move that decimal point three places to the right. Remember to add zeros to mark each movement. 1.5 grams = = 1,500 milligrams FIGURE 6-1 Converting from grams to milligrams Figure 6-1

2 1,000 mg = HOW MANY g? (1) Place decimal point in proper place. 1,000 mg = mg (2) Move that decimal point three places to the left mg = g or 1 g 2,500 mg = HOW MANY g? (1) Place decimal point in proper place. 2,500 mg = mg (2) Then move decimal point three places to left mg = g or 2.5 g FIGURE 6-2 Converting from milligrams to grams Figure 6-2

3 45 kg = HOW MANY g? (1) Place decimal point in proper place. 45 kg = 45. kg (2) Move that decimal point three places to the right. 45. kg = g or 45,000 g FIGURE 6-3 Converting from kilograms to grams Figure 6-3

4 25 g = HOW MANY kg? (1) Place decimal point in proper place. 25 g = 25. g (2) Then move decimal point three places to left. 25. g = kg or kg FIGURE 6-4 Converting from grams to kilograms Figure 6-4

5 2.525 l = HOW MANY ml? (1) I: move decimal point three places to right (2) Then I = ml = 2525 ml. FIGURE 6-5 Converting from liters to milliliters Figure 6-5

6 500 ml = HOW MANY l? (1) Place decimal point in proper place. 500 ml = 500. ml (2) Then move decimal point three places to left ml = l or l FIGURE 6-6 Converting from milliliters to liters Figure 6-6

7 Figure 6-7

8 TABLE 6-1 Fundamental Units of the Metric System The fundamental unit of length = the meter The fundamental unit of liquid volume = the liter The fundamental unit of weight = the gram Table 6-1

9 TABLE 6-2 Important Metric Relationships Mass and/or Weight Gram (g) is the base unit 1 microgram (mcg, µg) of a gram 1 milligram (mg) of a gram 1 gram (g) 1 gram 1 kilogram (kg) 1000 grams Volume Liter (l) is the base unit 1 milliliter (ml) of a liter 1 liter (l) 1 liter Length Meter (m) is the base unit 1 micrometer (mcm, µm) of a meter 1 millimeter (mm) of a meter 1 meter (m) 1 meter 1 kilometer (km) 1000 meters Table 6-2

10 TABLE 6-3 Metric System Guidelines 1. Arabic numbers are used to designate whole numbers: 1, 25, 2500, and so forth. 2. Decimal fractions are used for quantities less than one: 0.1, 0.01, 0.001, and so forth. 3. To insure accuracy, place a zero before the decimal point: 0.1, 0.01, and so forth. 4. The Arabic number precedes the metric unit of measurement: 1 g, 30 ml, and so forth. 5. Abbreviations are generally used. 6. If the term is used, the prefixes are written in lowercase letters: milli, centi, and so forth. 7. Capitalize the measurement and symbol when it is named after a person: Celsius (C) 8. Periods are not used with most abbreviations or symbols. 9. Abbreviations for units are the same for singular and plural forms. An s is not added to indicate the plural form. Table 6-3

11 TABLE 6-4 Apothecary System Liquid Measures 60 minims = 1 fluid dram 8 fluid drams (480 minims) = 1 fluid ounce 16 fluid ounces = 1 pint 2 pints = 1 quart 4 quarts = 1 gallon Table 6-4

12 TABLE 6-5 Apothecary System Weight Measures 60 grains (gr) = 1 dram (dr) 8 drams (480 grains) = 1 ounce (oz) 1.2 ounces (oz) = 1 pound (lb) Table 6-5

13 TABLE 6-6 Eqivalents for the Metric, Household, and Apothecary Systems of Measure Length Metric base unit = meter 1 meter = yards 1 centimeter = inch 1 inch = 2.54 centimeters 1 kilometer = mile 1 mile = 5280 feet or kilometers 1 foot = meter Weight Metric base unit = gram 1 kilogram = 2.2 pounds 1 pound = grams 1 pound = 16 ounces 1 grain = 65 milligrams or 1 grain = 60 milligrams 1 dram = grams 1 ounce = grams 1 ton = 2000 pounds 1 gram = ounces Volume Metric base unit = liter 1 liter = quarts 1 gallon = 4 quarts 1 gallon = 8 pints 1 pint = 2 cups = 16 fluid ounces 1 cup = 8 fluid ounces 1 gallon = liters 1 quart = 32 fluid ounces 1 quart = liter 1 minim = 0.06 milliliter 1 fluid dram = 3.7 milliliter 1 ounce = approximately 30 milliliters 1 milliliter = 1 cubic centimeter Table 6-6

14 TABLE 6-7 Review of Metric-to-Metric Conversions Linear Measure: base unit is meters (m) 1 m = 100 centimeters (cm) 1 m = 1000 millimeters (mm) 1 m = 1,000,000 micrometers or microns (mcm, µm or µ) 1000 m = 1 kilometer (km) or m = 1 km Volume Measure: base unit is liter (l) 1 l = 100 centiliters (cl) 1 l = 1000 milliliters (ml) 1000 l = 1 kiloliter (kl) Weight Measure: base unit is gram (g) 1 g = 100 centigrams (cg) 1 g = 1000 milligrams (mg) 1 g = 1,000,000 micrograms or g = 1 microgram (mcg or µg) mg = 1 microgram (mcg or µg) 1 mg = 1000 micrograms (mcg or µg) Table 6-7

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