Rules of writing roman numerals with examples

Rules of writing roman numerals with examples

While writing, the Roman number system, like the Hindu-Arabic number system, has several rules that must be followed. As a result, the five laws of Roman numerals are as follows:

I. The value of a sign increases with each repetition.

Example:

 XX = 10+10=20

II. Only I, X, C, and M can be repeated three times consecutively. In addition, the integers L, V, and D cannot be repeated. Otherwise, the number will become invalid.

Example:

Roman Numbers Valid/Invalid

MCXXXXIII         Invalid

XXII                Valid

LLXXII                Invalid

LXI                        Valid

III. In addition, the digit with the greater value moves to the left of the digit with the lower value.

Example:

10 + 2 = 12

X + II = XII

IV. In subtraction, the higher value digit follows the lower value digit to the right.

Example:

10 – 1 = 9

X – I = IX

V. Subtraction can only be done using the letters I, X, and C.

Click to know Roman Numerals Chart 1 to 100 and practice question related to roman numerals

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