Roman Numerals. Roman numerals are a numeral system that originated in ancient Rome and remained the usual way of writing numbers throughout Europe well into the Late Middle Ages. Numbers in this system are represented by combinations of letters from the Latin alphabet.
2. Roman Numerals Maths worksheets from mathsphere.co.uk We didn’t use numbers like you when counting and doing maths. We used capital letters, which made it much harder! The Romans used these capital letters: I V X L C D M 1 5 10 50 100 500 1000 These letters were put together to form all the numbers, like this: I=1 II = 2 III = 3 IV = 4 V=5 VI = 6 VII = 7 VIII = 8 IX = 9 There are two rules you need to know: 1. put a letter after a larger one means you add it. 2. put a letter before a larger one means you take it away. So XI is 10 + 1 = 11 and IX is 10 -1 = 9 CX is 100 + 10 = 110 and XC is 100 - 10 = 90 Work out what numbers these Roman numerals represent: 1. VIII = 2. IV = 3. XII = 4. XV = 5. LX = 6. XL = 7. XIV = 8. XVII = Write these numbers in Roman numerals: 9. 13 = 10. 22 = 11. 30 = 12. 49 = 13. 25 = 14. 101 = 15. 99 = 16. 90 = Page 2
3. Roman Numerals Maths worksheets from mathsphere.co.uk Remember, the Romans used letters for their numbers. Here are the letters they used. The Romans used these capital letters: I V X L C D M 1 5 10 50 100 500 1000 Try writing the numbers from 10 to 20 using Roman numerals. 10 11 13 14 15 16 17 18 19 20 Try writing these Roman numerals as numbers. XXXI XVI XX XLVII XXXV XXVIII XXXIX XLI Now try these harder Roman numerals. 1. CLXI 2. CCIII 3. CCCXLV 4. CD Page 3
4. Roman Numerals Maths worksheets from mathsphere.co.uk Just a reminder of the letters us Romans used for counting and adding etc. The Romans used these capital letters: I V X L C D M 1 5 10 50 100 500 1000 Try counting up in hundreds, using Roman numerals. 100 200 300 400 500 600 700 800 900 1000 Try writing these Roman numerals as numbers. CC1 CCCX CDXX DL DXCIX DCIX DCCL DCCCI Now try some really tricky Roman numerals. 1. LXIX 2. DXLIX 3. DCCCXV 4. DCCCLXXXVIII Page 4
5. Roman Numerals Maths worksheets from mathsphere.co.uk Let’s have a look at how years are written using Roman numerals. The Romans used these capital letters: I V X L C D M 1 5 10 50 100 500 1000 Try writing these years using, using Roman numerals. 1960 1870 2013 1066 1666 2020 Now try to write these years in numbers: MMXV MDLXVI MM MDCCCL MCMXC MCDL Page 5
6. Roman Numerals Maths worksheets from mathsphere.co.uk Answers Page 2 1. 8 2. 4 3. 12 4. 15 5. 60 6. 40 7. 14 8. 17 9. XIII 10. XXII 11. XXX 12. IL 13. XXV 14. CI 15. IC 16. XC Page 3 10. X 11. XI 12. XII 13. XIII 14. XIV 15. XV 16. XVI 17. XVII 18. XVIII 19. XIX 20. XX 31 16 20 47 35 28 39 41 1. 161 2. 203 3. 345 4. 400 Page 4 C CC CCC CD D DC DCC DCCC CM M 201 310 420 550 599 609 750 801 1. 69 2. 549 3. 815 4. 888 Page 5 1960: MCMLX 1870: MDCCCLXX 2013: MMXIII 1066: MLXVI 1666: MDCLXV1 2020: MMXX MMXV: 2015 MDLXVI: 1566 MM: 2000 MDCCCL: 1850 MCMXC: 1990 MCDL: 1450 Page 6
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