Roman Numerals to Arabic Numbers 10 to 1000 by 10

Different from Arabic numbers , there are 7 Roman numerals: I, V, X, L, C, D and M, where V is equal to 5 and M is equal to 1000.

The basic rule is when the larger number is in front, then add, while when the smaller number is in front, the minus. For example:

• VI: where V is 5 and I is 1, V is larger and in front, so add the 2 numbers together 5+1 = 6
• IL: where L is 50 and I is 1, I is smaller and in front, so minus the 2 numbers together 50-1 = 49
• where the letters are the same, add together: III = 1 + 1 + 1 = 3

Convert Rules:

The following is the table to convert from Roman numerals to Arabic numbers. For example,

• 230 = 200 + 30 = CC + XXX = CCXXX
• 580 = 500 + 80 = D + LXXX = DLXXX

The following is the conversion from Roman numerals to Arabic numbers for 10 to 1000 by 10:

The following is the conversion from Arabic numbers to Roman numerals for 10 to 1000 by 10:

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