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Just as we can add, subtract and multiply numbers, so can we do the same with Roman numerals. Let’s look at the following example:
[readmore]III  II = ?
III is the same as 1 + 1 + 1 = 3
II is the same as 1 + 1 = 2
III  II then is the same as 3  2 = 1
“1” in Roman numerals is “I” so the complete answer is: III  II = I
Now let’s look at another example:
IX x IV = ?
IX is the same as 10  1 = 9
IV is the same as 5  1 = 4
IX x IV then is the same as 9 x 4 = 36
“36” in Roman numerals is XXXVI so the complete answer is: IX x IV = XXXVI
Some helpful hints to remember are:
5 = V
10 = X
50 = L
100 = C
500 = D
1000 = M















XXV  XIV = ?
XXV is the same as 25 XIV is the same as 14 25  14 = 11 “11” in Roman numerals is “XI” so the complete answer is: XXV  XIV = XI. Answer (d) is the correct answer 

LI x VIII = ?
LI is the same as 51 VIII is the same as 8 51 x 8 = 408 “408” in Roman numerals is “CDVIII.” The letter “C” equals “100.” The letter “D” equal “500”. When the letter “C” comes before the letters “D” or “M” is tells you that you must subtract the letters so “CD” is the same as 500  100 = 400. “V” is the number 5 and “III” is 1 + 1 + 1 = 3 so 5 + 3 = 8. So the complete answer is: LI x VIII = CDVIII. Answer (d) is the correct answer 
DLIX + MDC = ?
D is the same as 500 L is the same as 50 IX is the same as 9 M is the same as 1000 D is the same as 500 C is the same as 100 DLIX is the same as 500 + 50 + 9 = 559 MDC is the same as 1000 + 500 + 100 = 1600 559 + 1600 = 2159 “2159” in Roman numerals is “MMCLIX.” So the complete answer is: DLIX + MDC = MMCLIX. Answer (d) is the correct answer 

III x VI x V = ?
III is the same as 3 VI is the same as 6 V is the same as 5 3 x 6 = 18 x 5 = 90 “90” in Roman numerals is “XC.” When a single “X” comes before the letters “L” and “C” it tells you that you need to subtract. So “XC” is the same as 100  10 = 90. Answer (d) is the correct answer 
DCC  LIX + XXIX = ?
D is the same as 500 C is the same as 100 L is the same as 50 IX is the same as 9 X is the same as 10 DCC is the same as 500 + 100 + 100 = 700 LIX is the same as 50 + 9 = 59 XXIX is the same as 10 + 10 + 9 = 29 700  59 = 641 + 29 = 670 “670” in Roman numerals is “DCLXX.” “D” equals 500, “C” equals 100, “L” equals 50 and “XX” equals 10 + 10 = 20, giving us 500 + 100 + 50 + 20 = 670. Answer (d) is the correct answer 

M x III + LIV = ?
M is the same as 1000 I is the same as 1 L is the same as 50 IV is the same as 4 M x III is the same as 1000 x 3 = 3000 LIV is the same as 50 + 4 = 54 3000 + 50 + 4 = 3054 “3054” in Roman numerals is “MMMLIV.” Answer (d) is the correct answer 
LXXX + LXXX = ?
L is the same as 50 X is the same as 10 XXX is the same as 10 + 10 + 10 = 30 50 + 30 = 80 80 + 80 = 160 “160” in Roman numerals is “CLX.” Answer (d) is the correct answer 

D + L + M = ?
D is the same as 500 L is the same as 50 M is the same as 1000 500 + 50 + 1000 = 1550 “1550” in Roman numerals is “MDL.” Answer (d) is the correct answer 
XL + VI + CIV = ?
X is the same as 10 L is the same as 50 V is the same as 5 I is the same as 1 C is the same as 100 IV is the same as 4 XL is the same as 50  10 = 40 VI is the same as 5 + 1 = 6 CIV is the same as 100 + 5  1 = 104 40 + 6 + 104 = 150 “150” in Roman numerals is “CL.” Answer (d) is the correct answer 
III is the same as 3
VI is the same as 6
10 + 3 + 6 = 19
“19” in Roman numerals is “XIX” so the complete answer is: X + III + VI = XIX. Answer (c) is the correct answer