11 lines
1.0 KiB
HTML
11 lines
1.0 KiB
HTML
<h3>Roman Numerals</h3>
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<p>Roman numerals originated in ancient Rome and remained the standard way of writing numbers throughout Europe well into the Middle Ages. They use combinations of letters from the Latin alphabet.</p>
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<h3>Symbols</h3>
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<div class="theory-example">I = 1 V = 5 X = 10 L = 50 C = 100 D = 500 M = 1000</div>
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<h3>How it works</h3>
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<p>Roman numerals are primarily additive: values are summed left to right. However, a smaller value placed before a larger one indicates subtraction:</p>
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<div class="theory-example">IV = 5 − 1 = 4 IX = 10 − 1 = 9<br>XL = 50 − 10 = 40 XC = 100 − 10 = 90 CM = 1000 − 100 = 900</div>
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<h3>Examples</h3>
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<div class="theory-example">XLII = 40 + 2 = 42<br><br>MCMXCIV = 1000 + 900 + 90 + 4 = 1994</div>
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<h3>Rules</h3>
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<p>Roman numerals can represent numbers from 1 to 3999. I, X, C, and M can be repeated up to three times. V, L, and D are never repeated. The subtractive combinations IV, IX, XL, XC, CM, and CD are the only allowed subtractions.</p> |