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Roman numerals

You learn to read Roman numerals and change them to ordinary numbers.

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How to work it out

  1. I is 1, V is 5, X is 10, L is 50, C is 100, D is 500 and M is 1000.
  2. Add up the values.
  3. If a smaller numeral is before a larger one (like IV or IX), take it away.
  • X+10
  • V+5
  • I+1

10 + 5 + 1 = 16

XVI

  1. Look at the letters: X is 10, V is 5 and I is 1.
  2. The letters go from biggest to smallest.
  3. Add the values: 10 + 5 + 1 = 16.
  4. The number XVI is 16.
More examples

XIV

  1. X is 10 and IV is 5 − 1 = 4.
  2. Add together: 10 + 4 = 14.
  3. The number is 14.
  • X+10
  • I−1
  • V+5

10 − 1 + 5 = 14

XLV

  1. XL is 50 − 10 = 40 and V is 5.
  2. Add together: 40 + 5 = 45.
  3. The number is 45.
  • X−10
  • L+50
  • V+5

−10 + 50 + 5 = 45