Numeric Systems n Two types of numeric systems
![Numeric Systems n Two types of numeric systems are used in pharmaceutical calculations: q Numeric Systems n Two types of numeric systems are used in pharmaceutical calculations: q](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-1.jpg)
![Numeric Systems 2 Numeric Systems 2](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-2.jpg)
![Numeric Systems New safety guidelines discourage the use of Roman numerals. 3 Numeric Systems New safety guidelines discourage the use of Roman numerals. 3](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-3.jpg)
![Time n n Military (or international) time often used in hospital settings Based on Time n n Military (or international) time often used in hospital settings Based on](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-4.jpg)
![Terms to Remember nmilitary time a measure of time based on a 24 hour Terms to Remember nmilitary time a measure of time based on a 24 hour](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-5.jpg)
![Time The use of military time reduces errors. 6 Time The use of military time reduces errors. 6](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-6.jpg)
![Temperature n Fahrenheit scale q q n US is one of few countries to Temperature n Fahrenheit scale q q n US is one of few countries to](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-7.jpg)
![Terms to Remember n. Fahrenheit temperature scale the temperature scale that uses 32 °F Terms to Remember n. Fahrenheit temperature scale the temperature scale that uses 32 °F](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-8.jpg)
![Terms to Remember n. Celsius temperature scale the temperature scale that uses zero degrees Terms to Remember n. Celsius temperature scale the temperature scale that uses zero degrees](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-9.jpg)
![Temperature n Conversions °F = (1. 8 x °C) + 32° °C = (°F Temperature n Conversions °F = (1. 8 x °C) + 32° °C = (°F](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-10.jpg)
![Discussion n Why is the metric system preferred over other systems? What are the Discussion n Why is the metric system preferred over other systems? What are the](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-11.jpg)
![Basic Calculations Used in Pharmacy Practice n n Fractions Decimals Ratios and proportions Percents Basic Calculations Used in Pharmacy Practice n n Fractions Decimals Ratios and proportions Percents](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-12.jpg)
![Fractions n n Fractions are parts of a whole. Simple fractions consist of two Fractions n n Fractions are parts of a whole. Simple fractions consist of two](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-13.jpg)
![Terms to Remember nfraction q a portion of a whole that is represented as Terms to Remember nfraction q a portion of a whole that is represented as](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-14.jpg)
![Decimals n n Decimals are expressed using integers and a point (. ) to Decimals n n Decimals are expressed using integers and a point (. ) to](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-15.jpg)
![Terms to Remember ndecimal any number that can be written in decimal notation using Terms to Remember ndecimal any number that can be written in decimal notation using](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-16.jpg)
![Terms to Remember nleading zero a zero that is placed in the ones place Terms to Remember nleading zero a zero that is placed in the ones place](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-17.jpg)
![Decimals For a decimal value less than 1, use a leading zero to prevent Decimals For a decimal value less than 1, use a leading zero to prevent](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-18.jpg)
![Decimals can be converted to fractions: q q The numerator is the decimal number Decimals can be converted to fractions: q q The numerator is the decimal number](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-19.jpg)
![Decimals n n Often rounded to a specific decimal place To round to the Decimals n n Often rounded to a specific decimal place To round to the](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-20.jpg)
![Decimals When rounding calculations of IV fluid drops per minute (gtt/min), round partial drops Decimals When rounding calculations of IV fluid drops per minute (gtt/min), round partial drops](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-21.jpg)
- Slides: 21
![Numeric Systems n Two types of numeric systems are used in pharmaceutical calculations q Numeric Systems n Two types of numeric systems are used in pharmaceutical calculations: q](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-1.jpg)
Numeric Systems n Two types of numeric systems are used in pharmaceutical calculations: q Arabic n n n q Numbers Fractions Decimals Roman n n Capital letters Lowercase letters 1
![Numeric Systems 2 Numeric Systems 2](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-2.jpg)
Numeric Systems 2
![Numeric Systems New safety guidelines discourage the use of Roman numerals 3 Numeric Systems New safety guidelines discourage the use of Roman numerals. 3](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-3.jpg)
Numeric Systems New safety guidelines discourage the use of Roman numerals. 3
![Time n n Military or international time often used in hospital settings Based on Time n n Military (or international) time often used in hospital settings Based on](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-4.jpg)
Time n n Military (or international) time often used in hospital settings Based on a 24 hour clock with no AM or PM, with midnight being 0000 First two digits indicate hour, second two indicate minutes Thus 1800 = 6: 00 PM 4
![Terms to Remember nmilitary time a measure of time based on a 24 hour Terms to Remember nmilitary time a measure of time based on a 24 hour](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-5.jpg)
Terms to Remember nmilitary time a measure of time based on a 24 hour clock in which midnight is 0000, noon is 1200, and the minute before midnight is 2359; also referred to as international time q 5
![Time The use of military time reduces errors 6 Time The use of military time reduces errors. 6](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-6.jpg)
Time The use of military time reduces errors. 6
![Temperature n Fahrenheit scale q q n US is one of few countries to Temperature n Fahrenheit scale q q n US is one of few countries to](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-7.jpg)
Temperature n Fahrenheit scale q q n US is one of few countries to use it. Water freezes at 32° and boils at 212°. Celsius scale q q q Scale was developed in Sweden in the 1700 s. Water freezes at 0° and boils at 100°. Scale is often used in healthcare settings. 7
![Terms to Remember n Fahrenheit temperature scale the temperature scale that uses 32 F Terms to Remember n. Fahrenheit temperature scale the temperature scale that uses 32 °F](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-8.jpg)
Terms to Remember n. Fahrenheit temperature scale the temperature scale that uses 32 °F as the temperature at which water freezes at sea level and 212 °F as the temperature at which it boils q 8
![Terms to Remember n Celsius temperature scale the temperature scale that uses zero degrees Terms to Remember n. Celsius temperature scale the temperature scale that uses zero degrees](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-9.jpg)
Terms to Remember n. Celsius temperature scale the temperature scale that uses zero degrees (i. e. , 0 °C) as the temperature at which water freezes at sea level and 100 °C as the temperature at which it boils q 9
![Temperature n Conversions F 1 8 x C 32 C F Temperature n Conversions °F = (1. 8 x °C) + 32° °C = (°F](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-10.jpg)
Temperature n Conversions °F = (1. 8 x °C) + 32° °C = (°F - 32°) ÷ 1. 8 10
![Discussion n Why is the metric system preferred over other systems What are the Discussion n Why is the metric system preferred over other systems? What are the](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-11.jpg)
Discussion n Why is the metric system preferred over other systems? What are the common measures, and how are they used in the practice of pharmacy? What are the pharmacy standards for numeric systems and measurements of time and temperature? 11
![Basic Calculations Used in Pharmacy Practice n n Fractions Decimals Ratios and proportions Percents Basic Calculations Used in Pharmacy Practice n n Fractions Decimals Ratios and proportions Percents](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-12.jpg)
Basic Calculations Used in Pharmacy Practice n n Fractions Decimals Ratios and proportions Percents 12
![Fractions n n Fractions are parts of a whole Simple fractions consist of two Fractions n n Fractions are parts of a whole. Simple fractions consist of two](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-13.jpg)
Fractions n n Fractions are parts of a whole. Simple fractions consist of two numbers: q q n Numerator (top number) Denominator (bottom number) The value of a fraction equals the numerator divided by the denominator. 13
![Terms to Remember nfraction q a portion of a whole that is represented as Terms to Remember nfraction q a portion of a whole that is represented as](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-14.jpg)
Terms to Remember nfraction q a portion of a whole that is represented as a ratio nnumerator the number on the upper part of a fraction that represents the part of the whole q ndenominator the number on the bottom part of a fraction that represents the whole q 14
![Decimals n n Decimals are expressed using integers and a point to Decimals n n Decimals are expressed using integers and a point (. ) to](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-15.jpg)
Decimals n n Decimals are expressed using integers and a point (. ) to separate the “ones” place from the “tenths” place. When the value is less than one, a leading zero is placed before the decimal point. 15
![Terms to Remember ndecimal any number that can be written in decimal notation using Terms to Remember ndecimal any number that can be written in decimal notation using](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-16.jpg)
Terms to Remember ndecimal any number that can be written in decimal notation using the integers 0 through 9 and a point (. ) to divide the “ones” place from the “tenths” place (e. g. , 10. 25 is equal to 10¼) q 16
![Terms to Remember nleading zero a zero that is placed in the ones place Terms to Remember nleading zero a zero that is placed in the ones place](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-17.jpg)
Terms to Remember nleading zero a zero that is placed in the ones place in a number less than zero that is being represented by a decimal value q 17
![Decimals For a decimal value less than 1 use a leading zero to prevent Decimals For a decimal value less than 1, use a leading zero to prevent](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-18.jpg)
Decimals For a decimal value less than 1, use a leading zero to prevent errors. 18
![Decimals can be converted to fractions q q The numerator is the decimal number Decimals can be converted to fractions: q q The numerator is the decimal number](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-19.jpg)
Decimals can be converted to fractions: q q The numerator is the decimal number without the point (1. 33 133). The denominator is a power of 10 equal to the number of decimal places (1. 33 100). 19
![Decimals n n Often rounded to a specific decimal place To round to the Decimals n n Often rounded to a specific decimal place To round to the](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-20.jpg)
Decimals n n Often rounded to a specific decimal place To round to the nearest tenth q q Carry division to two decimal places Evaluate number in hundredths place n n n If 5 or greater, add one to the tenths-place number (round up) If less than 5, omit the hundredths-place number (round down) Examples: 6. 75 becomes 6. 8; 2. 32 becomes 2. 3 20
![Decimals When rounding calculations of IV fluid drops per minute gttmin round partial drops Decimals When rounding calculations of IV fluid drops per minute (gtt/min), round partial drops](https://slidetodoc.com/presentation_image/05032eb68ff31a9178edef9600c287f3/image-21.jpg)
Decimals When rounding calculations of IV fluid drops per minute (gtt/min), round partial drops down. If a calculation indicates 28. 6 gtt/min, the answer is rounded down to 28 gtt/min, not 29 gtt/min. Calculations involving drops are discussed in Chapter 7. 21
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