Roman Numerals Adding value to letters I, V,

Roman Numerals Adding value to letters I, V, X, L, C, D, M 02/26/20 Romans preferred capital letters Values: I,

V, 1, 5, X, L, 10, 50, C, 100, D, M 500, 1,000 02/26/20 From one to twenty I= 1 II= 2 III= 3 IV= 4 V= 5 VI= 6 VII= 7 VIII= 8 IX= 9 X= 10 XI=11 XII= 12 XIII= 13 XIV= 14 XV= 15

XVI= 16 XVII= 17 XVIII= 18 XIX= 19 XX= 20 02/26/20 The importance of one and five I, V, X, L, C, D, M 5, 10, 50, 100,

500, 1,000 Values: 1, 02/26/20 Only one time

V, L, and D can be used only once: V... L... D... VII XXV CCCVIII LXX CCLIII MMLV DCCX MDXX MDCCLXXVI 02/26/20 Up to three times

I, X, C, and M can be used up to three times: I... X... C... M VIII LII CXVI LXX CLXXX DXVI DCCX

MDCXX MDCCC MMV MMMD MCDXCII 02/26/20 Writing 4, 9, 40, 90, 400, and 900 Subtract values positioning I, X, and C at the left: I... X... C... V= 5 IV = 5 -1 X= 10 IX= 10 -1

L= 50 XL= 50 -10 C= 100 XC= 100 -10 D= 500 CD= 500 -100 M= 1000 CM= 1000 -100 02/26/20 Practice MCDXCII MDCXX MDCCLXXVI MCMXIV MCMXLV

MCMXCIX MM MMV 02/26/20 Answers MCDXCII MDCXX MDCCLXXVI MCMXIV 1,492 1,620 1,776 1,914 MCMXLV MCMXCIX MM MMV 1,945 1,999 2,000 2,005

02/26/20 We still use them QuickTime and a TIFF (LZW) decompressor are needed to see this picture. Roman numerals are used today: To announce important events In book chapters In clocks Can you find out where else do the Roman Numerals are used today? 02/26/20

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