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Presentation on theme: "man/html/RomanMatch.htmlhttp://fi.edu/time/keepers/Silver man/html/RomanMatch.html Please open above link and play a."— Presentation transcript:

1 http://fi.edu/time/keepers/Silver man/html/RomanMatch.htmlhttp://fi.edu/time/keepers/Silver man/html/RomanMatch.html Please open above link and play a game of matching Roman numerals

2 Match each Hindu-Arabic numeral to its corresponding Roman numerals. A) 11 1) XX B)33 2) XI C)8 3)XIX D)20 4)XXII E)19 5)VIII F)22 6)XXXIII

3 forms small groups and find out the rules for writing Roman numerals. Please answer following question. 5 = V 4= IV 6 = VI X= 10 XI=11 IX= 9 What do you see? L= 50 40 = XL why?

4 A letter to the right of a numeral means that its value should be added. 3=III, 6=VI, 7=VII A letter to the left of a numeral means that its value is subtracted. 4= IV, 9= IX Can you tell me up to which numbers these rules followed? How you write 40 in roman numerals

5 The number 40 cannot be written as XXXX because no letter should be repeated more than three times. It is 50-10 or XL,where L denotes the number 50 How you write Roman numerals for following numbers. 41,,49 53,55 57 60,80, 89,90 95,100,150, 450,900

6 Only subtract powers of ten (I,X, Or C but not V,L or D Do not subtract a letter from another letter that is more than 10 times greater.eg 91 cannot be written as IXC It is written as XCI Which is the correct roman numeral for 48 ? A) IIL B)XXXXVIII C)XLVIII Only subtract a single letter from another single numeral.

7 Convert CCXCVII to Arabic number. Convert 447 to a Roman numeral Now you learn how to write roman numerals so complete this worksheet and send it to me. My email id is usha.dherange@gmail.com


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