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Online Quiz (Worksheet A B C D)

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Grade 6 - Mathematics
1.9 Changing Roman Numerals into Indo Arabic Numerals

Table for Roman Numerals
Roman Numerals IV X L C DM
Indo Arabic Numerals 1 5 10 50 100 500 1000
Rules:
  1. If a symbol is repeated twice or thrice, the value of the numeral is obtained by adding the values of the symbol as many times as it is repeated.
    Examples:
    II = 1+1 = 2
    III = 1+1+1 =3
    XX = 10+10 = 20
    Note: The symbol V is never repeated.
  2. To write a number in which the smallest digit always comes to the right of the greater digit, we add the values of all the digits.
    Examples:
    VII = 5 + 1 + 1 = 7
    XI = 10 + 5 = 15
    LXVI = 50 + 10 + 5 +1 = 66
  3. To write a number in which the smaller digit is placed before the greater digit, we subtract the value of the smaller digit from that of the greater digit.
    Examples:
    IV = 5 - 1 = 4
    LIX = 50 + (10-1) = 59
    Note: The symbol V is never subtrated.
  4. For the number beyond 10, we first write the number in groups of 10s and Is and then form the Roman numeral corresponding to the given number.
    Examples:
    12 = 10+2 = XII
    20 = 10+10 = X+X = XX
    24 = 10+10+4 = 10+10+(5-1) = X+X+IV = XXIV
    26 = 10+10+6 = XXVI
    39 = 10+10+10+9 = XXXIX
Rules for subtracting letters:
  1. Subtract only powers of ten, such as I, X, or C but not V or L.
    Writing VL for 45 is not allowed: instead write XLV.
    For 95, do not write VC(100-5) instead write XCV (XC+V or 90+5.
  2. Subtract only a single letter from a single numeral.
    Write VIII for 8, not IIX; 19 is XIX, not IXX, XIII for 13 not IIXV(15-1-1)
  3. Don't subtract a letter from another letter more than ten times greater. This means that you can only subtract I from V or X, and X from L or C, so MIM is not correct.
    For 99, do not write IC(C-1 or 100-1) instead write: XCIX (XC+IX) or 90+9.

Directions: Change the given Roman Numerals into Indo Arabic Numerals. Also write a table for roman numerals from 1 - 40.
Q 1: DCCIL
744
749
746
739

Q 2: LXIX
69
59
65
70

Q 3: DCIV
605
604
608
606

Q 4: MCD
1500
1400
1300
1450

Q 5: MDCX
1610
1690
1590
1600

Q 6: DXC
590
620
600
610

Q 7: LIX
59
44
39
45

Q 8: LVIII
48
58
55
56

Question 9: This question is available to subscribers only!

Question 10: This question is available to subscribers only!


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