Nursing Preparation Study Guide

Nursing Preparation Study Guide

There are other prefixes that than ones mentioned in the table, but those are the primary ones we use. Common Metric Conversions Length Weight Volume 1 km = 1000 m 1 kg = 1000 g 1kL = 1000 L 1m = 0.001 km 1 g = 0.001 kg 1 L = 0.001 kL 1 m = 100 cm 1 g = 100 cg 1 L = 100 cL 1 cm = 0.01 m 1 cg = 0.01 g 1 cL = 0.01 L 1 m = 1000 mm 1 g = 1000 mg 1 L = 1000 mL 1 mm = 0.001 m 1 mg = 0.001 g 1 mL = 0.001 L When converting metric units you can use dimensional analysis like you didwith the customary units. Typically, when converting from a larger unit to a smaller unit your non-one values will be in the top fractions and the one will be the bottom fraction. The numerical value will appear larger than what you started with. Example Convert 3 km to cm. 3 km 1 × 1000 m 1 km × 100 cm 1 m = 3 × 1000 × 100 1 × 1 × 1 cm = 300,000 cm If converting from a smaller unit to a larger unit then your non-one value will be in the bottom of the fraction and the one value will be in the top. You should notice that the numerical value will appear smaller than what you started with. Example Convert 25 mg to Hg. 25 mg 1 × 1 g 1000 mg × 1 Hg 100 g = 25 × 1 × 1 1 × 1000 × 100 Hg = 25 100,000 Hg = 0.00025 Hg The easiest way to convert units in the metric system is just by moving the decimal place. Notice 3 km is the same as 3.0 km. If we look back at the metric prefix chart above we see that cm is 5 units to the right of km. So, we could just move the decimal 5 places to the right.

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