# Chapter 6

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1. Positional notation
a system used in roman numerals whereby the position of the numeral signifies its mathematic value
2. denominator
the bottom or right number in a fraction
3. numerator
the top or left number in a fraction
4. Reciprocals
two different fractions that equal 1 when multiplied together
5. least common denominator
smallest possible denominator for an equivalent fraction so that two fractions can be added or subtracted and have the same denominator
6. Significant figure (significant digit)
is a figure that is actually measured using the measuring device
7. Rules for assigning significant figures
• 1. digits other than zero are always significant
• 2. final zeros after a decimal point are always significant
• 3. zeros between two other significant digits are always significant
• 4. zeros used only to space the decimal are never significant
8. Conversions
changing one unit of measure into another so that both amounts remain equal
9. Equation
a mathematical statement in which two terms are equal
10. Variable
an unknown value in a mathematical equation.
11. Flow rate
the rate (in ml/hr or ml/minute) at which a solution administered to a patient: also known as the rate of administration
12. Concentration
the strength of a solution as measured by the weight-to-volume or volume-to-volume of the substance being measured.
13. Total parenteral nutrition
administration of all nutrients intravenously; also known as hyperalimentation
the quantity needed to make a prescribed amount
15. millequivalent (mEq)
the unit of measure for electrolytes in a solution
16. Valence
the number of positive or negative charges on an ion.
17. Powder volume
the proportion of the column of the final mixed product that is attributed to the powder
18. Body surface area
a measure used for dosage that is calculated from the height and weight of a person and measured in square meters
19. Namogram
a chart showing relationships between measurements
20. Usual and customary price (U&C)
the price charged for a prescription if there are no discounts or third parties paying for the prescription
21. Gross profit
the difference between the selling price and the acquision cost
22. Net profit
the difference between the selling price of the prescription and the sum of all the costs associated with filling the prescription
 Author: icaneraseit ID: 144507 Card Set: Chapter 6 Updated: 2012-03-29 02:43:26 Tags: chapter Folders: Description: chapter 6 Show Answers: