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ROMAN NUMERALS

ROMAN NUMERALS. Made by M.Federica De Gasperis – Teacher of Primary School in IC Leonori di Roma. OUR NUMBER SYSTEM IS CALLED ARABIC WE HAVE TEN DIGITS. AND WE CAN MAKE AS BIG A NUMBER AS WE WANT. THESE FIGURES ARE SO BECAUSE THE ARABS COUNTED THE CORNERS.

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ROMAN NUMERALS

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  1. ROMAN NUMERALS MadebyM.Federica De Gasperis – TeacherofPrimarySchool in IC Leonori di Roma

  2. OUR NUMBER SYSTEM IS CALLED ARABIC WE HAVE TEN DIGITS AND WE CAN MAKE AS BIG A NUMBER AS WE WANT

  3. THESE FIGURES ARE SO BECAUSE THE ARABS COUNTED THE CORNERS

  4. THE ROMANS HAD DIFFERENT SYMBOLS FOR NUMBERS THE ROMANS HAD NOT SYMBOL FOR ZERO (O)

  5. V + I + I = VII FIVE + ONE + ONE = SEVEN IN THIS EXAMPLE THE PRINCIPLE OF ADDITION IS USED

  6. I 1 oneV 5 fiveX 10 tenL 50 fiftyC 100 onehundredD 500 fivehundredM 1000 onethousand

  7. ADDITION IN ONLY APPLICABLE WHEN THEFIRSTNUMBER IS GREATERTHAN THE SECOND, THIRD … XIis 11 XXis 20 XIis 11 LXXis 70 CX is110 MCis 1100

  8. COLOSSEUM ITS CONSTRUCTION STARTED UNDER EMPEROR VESPASIANO IN LXXII AND WAS COMPLETED UNDER TITUS IN LXXX

  9. ST. PETER BASILICA THE CONSTRUCTION BEGAN IN MDVI

  10. ARC OF COSTANTHINE DEDICATED IN CCCXV

  11. GAIUS IULIUS CAESAR HE WAS BORN IN CIA.B. AND WAS ASSASINATED ON THE IDES OF MARCH (15 MARCH) XLIVA.B.

  12. XLIV = 44 IN THIS EXAMPLE THE PRINCIPLE OFSUBTRACTIONIN USED SUBTRACTION IN ONLY APPLICABLE WHE THE FIRST SYMBOL IS LESS THAN THE SECOND ONE. IVis 4 IX is 9 XCis 14 CMis 90

  13. CDXLI THIS EXAMPLE COMBINES PRINCIPLE OF ADDITION AND SUBTRACTION MCDis 1400 CMLXis 960 XIVis 14 CXL is 140 MCMLVIIIis 1958

  14. IMPORTANT • WHEN THE PRINCIPLE OF ADDITION IS USED, A SYMBOL CAN BE USED 3 TIMES ONLY • PRINCIPLE OF MULTIPLICATION

  15. REMEMBER

  16. THANK YOU. BYE, BYE!

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