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Roman Empire

Roman Empire. Social Studies With Mrs. Hughes. How did the Romans count time, money and items?. 10-6-11 Bellringer: Explain this statement… When in Rome, do as the Romans do! __________________________ _________________________________ _________________________________

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Roman Empire

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  1. Roman Empire Social Studies With Mrs. Hughes

  2. How did the Romans count time, money and items? 10-6-11 Bellringer: Explain this statement… When in Rome, do as the Romans do! __________________________ _________________________________ _________________________________ _________________________________ _____________________________________________________________________________________________________ http://gtm-media.discoveryeducation.com/videos/29515/sec24298_700k.asf

  3. Page 4 Top Page • 1. A letter repeats its value that many times (XXX = 30, CC = 200, etc.). A letter can only be repeated three times. • 2. If one or more letters are placed after another letter of greater value, add that amount. VI = 6 (5 + 1 = 6) LXX = 70 (50 + 10 + 10 = 70) • 3. A bar placed on top of a letter or string of letters increases the numeral's value by 1,000 times. XV = 15, = 15,000

  4. Page 3 Bottom Page • 4. If a letter is placed before another letter of greater value, subtract that amount. IV = 4 (5 – 1 = 4) XC = 90 (100 – 10 = 90) • Several rules apply for subtracting amounts from Roman numerals: • a. Only subtract powers of ten (I, X, or C, but not V or L) For 95, do NOT write VC (100 – 5). DO write XCV (XC + V or 90 + 5) • b. Only subtract one number from another. For 13, do NOT write IIXV (15 – 1 - 1). DO write XIII (X + I + I + I or 10 + 3) • c. Do not subtract a number from one that is more than 10 times greater (that is, you can subtract 1 from 10 [IX] but not 1 from 20—there is no such number as IXX.) For 99, do NOT write IC (C – I or 100 - 1). DO write XCIX (XC + IX or 90 + 9)

  5. Pages 3 + 4 1/3 page Write the following numbers using Roman Numerals… • Write your birth month. • Write your age • Write the number 27 • Write the year 2011 • Write a Roman Numeral and let someone else solve it. • Complete the Roman Numerals conversion sheet.

  6. Brainpop.com • Yesterday, you watched a United Streaming Video, took notes, practiced using Roman Numerals and had a homework assignment. • Watch this brainpop carefully. See if you would change your answers on your homework sheet? (Do this quietly!) http://www.brainpop.com/math/numbersandoperations/romannumerals/

  7. Brainpop.com • Make final corrections on your homework • Switch with someone else. • Put your name on the bottom right hand corner. • Check their homework. • Hand in the homework sheet.

  8. Brainpop.com • Watch the brainpop again. • Take the quiz as a class.

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