1 / 8

Roman Numerals

Roman Numerals. Lesson 3. What are Roman numerals?. There are 7 Roman numerals. I = 1 V = 5 X = 10 L = 50 C = 100 D = 500 M = 1,000. How do Roman numerals work?. To add, place one or more numerals of equal or lesser value after a numeral. 3 III (I+I+I) 6 VI (V+I) 105 CV (C+V).

denzel
Télécharger la présentation

Roman Numerals

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Roman Numerals Lesson 3

  2. What are Roman numerals? • There are 7 Roman numerals. • I = 1 • V = 5 • X = 10 • L = 50 • C = 100 • D = 500 • M = 1,000

  3. How do Roman numerals work? • To add, place one or more numerals of equal or lesser value after a numeral. • 3 • III (I+I+I) • 6 • VI (V+I) • 105 • CV (C+V)

  4. How do Roman numerals work? • To subtract, place a smaller numeral before a larger one. • 9 • IX (I – X) • 4 • IV (I – V)

  5. Subtraction • There are some rules about subtraction. • I, X and C (1, 10, 100) are the only numerals that can be subtracted. • I can only be subtracted from V and X. • X can only be subtracted from L and C. • C can only be subtracted from D and M.

  6. Subtraction • I • V • X • L • C • D • M I X C

  7. How to write Roman numerals • Break down a number into its places: tens, hundreds, thousands • Write each section in Roman numerals • Arrange the results left-to-right. • 46 • 40 + 6 • XL + VI • XLVI • 125 • 100+20+5 • C+XX+V • CXXV

  8. Let’s practice! • 53 • 178 • 29 • 543 • 2011 • 50 + 3 LIII • 100 + 70+ 8 CLXXVIII • 20 + 9 XXIX • 500+40+3 DXLIII • 2,000 + 10 + 1 MMXI

More Related