Roman Numerals to Arabic Numbers 10 to 1000 by 10

David

4 years ago

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,

Number	Thousands	Hundreds	Tens	Ones
1	M	C	X	I
2	MM	CC	XX	II
3	MMM	CCC	XXX	III
4		CD	XL	IV
5		D	L	V
6		DC	LX	VI
7		DCC	LXX	VII
8		DCCC	LXXX	VIII
9		CM	XC	IX

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

Roman	Arabic	Roman	Arabic
X	10	DX	510
XX	20	DXX	520
XXX	30	DXXX	530
XL	40	DXL	540
L	50	DL	550
LX	60	DLX	560
LXX	70	DLXX	570
LXXX	80	DLXXX	580
XC	90	DXC	590
C	100	DC	600
CX	110	DCX	610
CXX	120	DCXX	620
CXXX	130	DCXXX	630
CXL	140	DCXL	640
CL	150	DCL	650
CLX	160	DCLX	660
CLXX	170	DCLXX	670
CLXXX	180	DCLXXX	680
CXC	190	DCXC	690
CC	200	DCC	700
CCX	210	DCCX	710
CCXX	220	DCCXX	720
CCXXX	230	DCCXXX	730
CCXL	240	DCCXL	740
CCL	250	DCCL	750
CCLX	260	DCCLX	760
CCLXX	270	DCCLXX	770
CCLXXX	280	DCCLXXX	780
CCXC	290	DCCXC	790
CCC	300	DCCC	800
CCCX	310	DCCCX	810
CCCXX	320	DCCCXX	820
CCCXXX	330	DCCCXXX	830
CCCXL	340	DCCCXL	840
CCCL	350	DCCCL	850
CCCLX	360	DCCCLX	860
CCCLXX	370	DCCCLXX	870
CCCLXXX	380	DCCCLXXX	880
CCCXC	390	DCCCXC	890
CD	400	CM	900
CDX	410	CMX	910
CDXX	420	CMXX	920
CDXXX	430	CMXXX	930
CDXL	440	CMXL	940
CDL	450	CML	950
CDLX	460	CMLX	960
CDLXX	470	CMLXX	970
CDLXXX	480	CMLXXX	980
CDXC	490	CMXC	990
D	500	M	1000

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

Arabic	Roman	Arabic	Roman
10	X	510	DX
20	XX	520	DXX
30	XXX	530	DXXX
40	XL	540	DXL
50	L	550	DL
60	LX	560	DLX
70	LXX	570	DLXX
80	LXXX	580	DLXXX
90	XC	590	DXC
100	C	600	DC
110	CX	610	DCX
120	CXX	620	DCXX
130	CXXX	630	DCXXX
140	CXL	640	DCXL
150	CL	650	DCL
160	CLX	660	DCLX
170	CLXX	670	DCLXX
180	CLXXX	680	DCLXXX
190	CXC	690	DCXC
200	CC	700	DCC
210	CCX	710	DCCX
220	CCXX	720	DCCXX
230	CCXXX	730	DCCXXX
240	CCXL	740	DCCXL
250	CCL	750	DCCL
260	CCLX	760	DCCLX
270	CCLXX	770	DCCLXX
280	CCLXXX	780	DCCLXXX
290	CCXC	790	DCCXC
300	CCC	800	DCCC
310	CCCX	810	DCCCX
320	CCCXX	820	DCCCXX
330	CCCXXX	830	DCCCXXX
340	CCCXL	840	DCCCXL
350	CCCL	850	DCCCL
360	CCCLX	860	DCCCLX
370	CCCLXX	870	DCCCLXX
380	CCCLXXX	880	DCCCLXXX
390	CCCXC	890	DCCCXC
400	CD	900	CM
410	CDX	910	CMX
420	CDXX	920	CMXX
430	CDXXX	930	CMXXX
440	CDXL	940	CMXL
450	CDL	950	CML
460	CDLX	960	CMLX
470	CDLXX	970	CMLXX
480	CDLXXX	980	CMLXXX
490	CDXC	990	CMXC
500	D	1000	M

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