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Know your Roman Numerals

Know your Roman Numerals. I = 1 V= 5 X = 10 L = 50 C= 100 D = 500 M= 1000. Know the Rules. No more than 3 of any symbol are used to represent a number If lower symbols follow larger symbols you just add XXVI = 26 XXI L CCXXXVII. Know the Rules.

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Know your Roman Numerals

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  1. Know your Roman Numerals • I = 1 • V= 5 • X = 10 • L = 50 • C= 100 • D = 500 • M= 1000

  2. Know the Rules • No more than 3 of any symbol are used to represent a number • If lower symbols follow larger symbols you just add • XXVI = 26 • XXI • L • CCXXXVII

  3. Know the Rules • If lower symbols come before larger symbols then you subtract the lower symbol from the bigger symbol • XIV =14 • MDXXIX • XCV • CDXC

  4. Practice • Change the Number into a Roman Numeral • 83 • 703 • 2956 • 21 • 50 • 10

  5. Pharmacology Application • A patient is to receive gr CDLXXX of milk of magnesia what is this in “normal #’s” • 500-100=400 • 400+50+10+10+10 • 480gr

  6. Pharmacology Application • Your patient is to receive a dosage of gr XX and you have tablets labeled gr V, how many tablets must you give? • XX= 20 • V= 5 • Need 4 tablets, 20/4=5

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