CALCULATIONS

# CALCULATIONS

## CALCULATIONS

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
##### Presentation Transcript

1. CALCULATIONS CHAPTER 6

2. CHAPTER OUTLINE • Numbers • Fractions • Decimal Numbers • Significant Figures • Measurement • Equations & Variables • Ratio & Proportion • Percents & Solutions • Alligation • Powder Volume • Children’s Doses • Calculations for Business • Review

3. ROMAN NUMERALS

4. ROMAN NUMERALS • Positional notation • When the second of two letters has a value equal to or smaller than that of the first, add their values • ixvi = 50 + 10 + 5 + 1 = 66 • When the second of two letters has a value greater than that of the first, subtract the smaller from the larger • xc = 10 subtracted from 100

5. FRACTIONS Numerators Denominators Reciprocals Adding and subtracting fractions Multiplying and dividing fractions

6. DECIMAL NUMBERS Multiplying decimals Significant figures

7. SIGNIFICANT FIGURES • Four 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. MEASUREMENT Metric system Avoirdupois system Apothecary system Household units Measuring temperature

9. METRIC SYSTEM LIQUIDS

10. METRIC SYSTEM SOLIDS

11. AVOIRDUPOIS SYSTEM

12. APOTHECARY SYSTEM

13. HOUSEHOLD UNITS

14. TEMPERATURE

15. RATIO & PROPORTION A ratio states a relationship between two quantities Two equal ratios form a proportion

16. PERCENTS & SOLUTIONS • Percent Weight-to-Volume • Grams per 100 milliliters • Percent Volume-to-Volume • Milliliters per 100 milliliters • Milliequivalents • mEq

17. MILLIEQUIVALENTS

18. COMMON ELECTROLYTES

19. ALLIGATION

20. POWDER VOLUME FV = D + PV

21. CHILDREN’S DOSES Clark’s Rule Young’s Rule Body Surface Area Body Weight

22. BUSINESS CALCULATIONS Selling prices Discounts Gross profit Net profit