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Drug math lesson 1

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Drug math lesson 1

  1. 1. Lesson One• Lesson 1 will consist of a basic math review.• All drug calculations can be simplified using basic math.
  2. 2. Objectives• Review, practice, and apply basic math skills. – Review Decimals & Fractions – Review Fraction Simplification• Learn how to convert grams• Learn how to perform weight conversions.
  3. 3. Whole Numbers• Whole numbers are numbers that don’t need to be expressed by a fraction or decimal. They are basic numbers.• Whole numbers can be expressed as a fraction or decimal if needed. – Examples: 25 = 25.0 = 25/1 25 is the same thing as 25 point zero, or 25 over 1.
  4. 4. Decimals• A decimal can be used to represent a percentage or fraction.______________________________________ 0.25 = 25% = 1/4 0.25 x 100 = 25 25% of 100 = 25 1/4 x 100 = 25
  5. 5. Decimals• Decimals become smaller denominations the further the digits extend to the right of the decimal._________________________________0.1 = One tenth0.01 = One hundredth0.001 = One Thousandth
  6. 6. Decimals• If no number exists before the decimal, place a zero to make things easier and remind yourself that a decimal exists. – Example .1 = 0.1
  7. 7. Decimals• Anytime you multiply a decimal by 10, you can move the decimal point one place to the right. – Examples: 0.354 x 10 = 3.54 0.27 x 10 = 2.7 4.56 x 10 = 45.6 0.25 x 10 = 2.5
  8. 8. Decimals• Furthermore if you multiply a decimal by 100 you can move the decimal point two spaces to the right. Multiply by 1000 and move it three spaces etc. – Examples: 2.578 x 100 = 257.8 0.25 x 1000 = 250 0.7685 x 10,000 = 7685
  9. 9. Fractions• The top number of the fraction is the numerator and the bottom number is the denominator.• A fraction is another way to express that you want to divide the numerator by the denominator. – Example: 25/100 = 25 ÷ 100
  10. 10. Fractions• Fractions can be simplified by dividing the numerator and the denominator by the same number. – Example: How to simplify 45/100 45 100 Is there a number that will divide into both 45 and 100 evenly?
  11. 11. Fractions• Fractions can be simplified by dividing the numerator and the denominator by the same number. – Example: How to simplify 45/100 45 ÷ 5 100 ÷ 5 The number 5 looks like it will probably work
  12. 12. Fractions• Fractions can be simplified by dividing the numerator and the denominator by the same number. – Example: How to simplify 45/100 45 ÷ 5 = 9 100 ÷ 5 = 20 45/100 = 9/20
  13. 13. FractionsSimplify 78/156
  14. 14. FractionsSimplify 78/156Does any number go into both the numerator and denominator evenly?Hint: If both numbers are even, they will always be divisible by 2.
  15. 15. FractionsSimplify 78/156 78 ÷ 2 156 ÷ 2
  16. 16. FractionsSimplify 78/156 78 ÷ 2 = 39 156 ÷ 2 = 78
  17. 17. FractionsSimplify 78/156 39 78
  18. 18. FractionsSimplify 78/156 39 ÷ 3 78 ÷ 3
  19. 19. FractionsSimplify 78/156 39 ÷ 3 = 13 78 ÷ 3 = 26
  20. 20. FractionsSimplify 78/156 13 26
  21. 21. FractionsSimplify 78/156 13 ÷ 13 = 1 26 ÷ 13 = 2
  22. 22. FractionsSimplify 78/156 78 156 = 1/2
  23. 23. FractionsSimplify 78/156 78 ÷ 78 = 1 156 ÷ 78 = 2
  24. 24. Conversion of Gramskilogram = kgGram = gmMilligram = mgMicrogram = mcg, µg, or ug
  25. 25. Conversion of Grams• 1 kg = 1000 grams• 1 gm = 1000 milligrams• 1 mg = 1000 micrograms
  26. 26. Conversion of Grams• 1 mcg = 0.001 milligrams• 1 mg = 0.001 grams• 1 gm = 0.001 kilograms• 1 mcg = 0.000001 grams
  27. 27. Conversion of Grams1 kg 1000 gm 100,000 mg1 mg 1000 mcg 0.001 gm1 mcg 0.001 mcg 0.000001 gm
  28. 28. Conversion of Grams• Convert 400mg into micrograms
  29. 29. Conversion of Grams• Convert 400mg into micrograms • 400mg = 400,000 mcg
  30. 30. Conversion of Grams• Convert 4 mcg into milligrams
  31. 31. Conversion of Grams• Convert 4 mcg into milligrams • 4mcg = 0.004mg
  32. 32. Weight Conversion• lb = pound• 1 kg = 2.2 lbs
  33. 33. Weight Conversion• Convert 110 lbs into kilograms
  34. 34. Weight Conversion• Convert 110 lbs into kilograms 110 ÷ 2.2
  35. 35. Weight Conversion• Convert 110 lbs into kilograms 110 ÷ 22
  36. 36. Weight Conversion• Convert 110 lbs into kilograms 110 ÷ 22 = 5
  37. 37. Weight Conversion• Convert 110 lbs into kilograms 5.0
  38. 38. Weight Conversion• Convert 110 lbs into kilograms 50
  39. 39. Weight Conversion• There is an easier way!• Take the patient’s weight in pounds and divide it by two. – If you end up with a two-digit number, subtract the first digit. ex. 81 - 8 = 73 – If you end up with a three-digit number, subtract by the first two digits. ex. 112 - 11 = 101 The result may be 1kg off.
  40. 40. Weight Conversion• Convert 176 lbs into kilograms
  41. 41. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2
  42. 42. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2 = 88
  43. 43. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2 = 88 88 - 8
  44. 44. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2 = 88 88 - 8 = 80
  45. 45. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2 = 88 88 - 8 = 80 Answer = 80kg
  46. 46. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2.2
  47. 47. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 22
  48. 48. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 22 = 8
  49. 49. Weight Conversion• Convert 176 lbs into kilograms 176 ÷ 2.2 = 80
  50. 50. Weight Conversion• Convert 176 lbs into kilograms 176 lbs = 80kg
  51. 51. End of Lesson One• Practice• Practice again• Practice some more

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