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1 - <p>313 Learners</p>

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2 <p>Last updated on<strong>August 5, 2025</strong></p>

3 <p>Roman numerals are the way of expressing numbers using symbols. I, V, X, L, C, D, and M are the symbols we use. Roman Numerals are used in royal titles, book names, sequences, and so on. Here we will be discussing Roman Numerals, rules, and examples.</p>

4 <h2>What is 138 in Roman Numerals?</h2>

5 <p>The royal titles, such as Henry I, Henry II, and so on. Have you noticed the names and wondered what these<a>symbols</a>(I and II) represented? Those are the Roman Numerals. Earlier people used to count using fingers, sticks, bones, etc. to count earlier. When life became complex a<a>standard form</a>was required to count. Ancient Romans used the Roman Numeral system to count. I (1), V (5), X (10), L (50), C (100), D (500), and M (1000) are the symbols we use to count.</p>

6 <p>In Roman Numerals, we use CXXXVIII to represent 138, where C is 100, XXX is 30, and VIII is 8. Let’s learn more about Roman numerals and how we write them.</p>

7 <h2>Basic Rules for 138 in Roman Numerals</h2>

8 <p>There are certain basic rules to write a<a>number</a>in Roman Numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.</p>

9 <p><strong>Rule 1: Addition Method</strong></p>

10 <p>The<a>addition</a>method is used when the smaller number is placed after the larger number. For example, CXXXVIII → C + XXX + VIII → 100 + 30 + 8 = 138.</p>

11 <p><strong>Rule 2: Repetition Method</strong></p>

12 <p>To write a large number, certain Roman Numerals can be repeated up to three times. For example, XXX → 30.</p>

13 <p><strong>Rule 3: Subtraction Method</strong></p>

14 <p>If a smaller number is followed by a larger number in Roman Numerals, we subtract the smaller number from the larger one. This is the<a>subtraction</a>method. For example, IV → V - I → 5 - 1 = 4.</p>

15 <p><strong>Rule 4: Limitation Rule</strong></p>

16 <p>The symbols cannot be repeated more than three times, and some symbols, like V, L, and D, cannot be repeated. For example, we won't write VV for 10; instead, we use X, and 8 we write as VIII, not IIIIIIII.</p>

17 <h2>How to Write 138 in Roman Numerals</h2>

18 <p>Let’s now learn how to write 138 in Roman Numerals. Follow these methods to write the number in Roman Numerals.</p>

19 <ul><li>By Expansion Method</li>

20 </ul><ul><li>By Grouping Method</li>

21 </ul><h3>Explore Our Programs</h3>

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23 <h2>138 in Roman Numerals by Expansion Method</h2>

22 <h2>138 in Roman Numerals by Expansion Method</h2>

24 <p>In the expansion method, based on the<a>place value</a>, the number is broken down. In this section, we will learn how to write 138 in Roman numerals using the expansion method.</p>

23 <p>In the expansion method, based on the<a>place value</a>, the number is broken down. In this section, we will learn how to write 138 in Roman numerals using the expansion method.</p>

25 <p>To write 138 in Roman Numerals, follow the steps:</p>

24 <p>To write 138 in Roman Numerals, follow the steps:</p>

26 <p><strong>Step 1</strong>: Break the number based on the place value: hundreds, tens, ones.</p>

25 <p><strong>Step 1</strong>: Break the number based on the place value: hundreds, tens, ones.</p>

27 <p>For 138, we write it as 100 + 30 + 8.</p>

26 <p>For 138, we write it as 100 + 30 + 8.</p>

28 <p><strong>Step 2:</strong>Convert the numbers into Roman Numerals:</p>

27 <p><strong>Step 2:</strong>Convert the numbers into Roman Numerals:</p>

29 <p>100 in Roman Numerals - C 30 in Roman Numerals - XXX 8 in Roman Numerals - VIII</p>

28 <p>100 in Roman Numerals - C 30 in Roman Numerals - XXX 8 in Roman Numerals - VIII</p>

30 <p><strong>Step 3</strong>: Combine the Roman Numerals together.</p>

29 <p><strong>Step 3</strong>: Combine the Roman Numerals together.</p>

31 <p>Therefore, 138 in Roman Numerals is C (100) + XXX (30) + VIII (8) = CXXXVIII.</p>

30 <p>Therefore, 138 in Roman Numerals is C (100) + XXX (30) + VIII (8) = CXXXVIII.</p>

32 <h2>138 in Roman Numerals by Grouping Method</h2>

31 <h2>138 in Roman Numerals by Grouping Method</h2>

33 <p>When writing a large number into Roman Numerals, we group the number.</p>

32 <p>When writing a large number into Roman Numerals, we group the number.</p>

34 <p>To write 138 in Roman Numerals, we group 138 as 100 + 30 + 8.</p>

33 <p>To write 138 in Roman Numerals, we group 138 as 100 + 30 + 8.</p>

35 <p>100 in Roman Numerals - C</p>

34 <p>100 in Roman Numerals - C</p>

36 <p>30 in Roman Numerals - XXX</p>

35 <p>30 in Roman Numerals - XXX</p>

37 <p>8 in Roman Numerals - VIII</p>

36 <p>8 in Roman Numerals - VIII</p>

38 <p>So, 138 is written as CXXXVIII in Roman Numerals.</p>

37 <p>So, 138 is written as CXXXVIII in Roman Numerals.</p>

39 <h2>Common Mistakes and How to Avoid Them in 138 Roman Numerals</h2>

38 <h2>Common Mistakes and How to Avoid Them in 138 Roman Numerals</h2>

40 <p>Students make mistakes when writing a number in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and the ways to avoid them.</p>

39 <p>Students make mistakes when writing a number in Roman Numerals. To master Roman Numerals, we can learn a few common mistakes and the ways to avoid them.</p>

41 <h3>Problem 1</h3>

40 <h3>Problem 1</h3>

42 <p>A historian is cataloging CXXXVIII ancient artifacts and wants to distribute them evenly on XIX display shelves. How many artifacts will be placed on each shelf?</p>

41 <p>A historian is cataloging CXXXVIII ancient artifacts and wants to distribute them evenly on XIX display shelves. How many artifacts will be placed on each shelf?</p>

43 <p>Okay, lets begin</p>

42 <p>Okay, lets begin</p>

44 <p>Each shelf will have VII artifacts.</p>

43 <p>Each shelf will have VII artifacts.</p>

45 <h3>Explanation</h3>

44 <h3>Explanation</h3>

46 <p>To find the number of artifacts per shelf, divide the total number of artifacts by the number of shelves.</p>

45 <p>To find the number of artifacts per shelf, divide the total number of artifacts by the number of shelves.</p>

47 <p>CXXXVIII = 138</p>

46 <p>CXXXVIII = 138</p>

48 <p>XIX = 19</p>

47 <p>XIX = 19</p>

49 <p>138 / 19 = 7</p>

48 <p>138 / 19 = 7</p>

50 <p>7 in Roman numerals is VII.</p>

49 <p>7 in Roman numerals is VII.</p>

51 <p>Well explained 👍</p>

50 <p>Well explained 👍</p>

52 <h3>Problem 2</h3>

51 <h3>Problem 2</h3>

53 <p>A collector has a collection of CXXVIII coins and acquires an additional X coins. What is the total number of coins now, in Roman numerals?</p>

52 <p>A collector has a collection of CXXVIII coins and acquires an additional X coins. What is the total number of coins now, in Roman numerals?</p>

54 <p>Okay, lets begin</p>

53 <p>Okay, lets begin</p>

55 <p>The total number of coins is CXXXVIII. </p>

54 <p>The total number of coins is CXXXVIII. </p>

56 <h3>Explanation</h3>

55 <h3>Explanation</h3>

57 <p>To find the total, add the number of additional coins to the existing collection.</p>

56 <p>To find the total, add the number of additional coins to the existing collection.</p>

58 <p>CXXVIII = 128</p>

57 <p>CXXVIII = 128</p>

59 <p>X = 10</p>

58 <p>X = 10</p>

60 <p>128 + 10 = 138</p>

59 <p>128 + 10 = 138</p>

61 <p>138 in Roman numerals is CXXXVIII.</p>

60 <p>138 in Roman numerals is CXXXVIII.</p>

62 <p>Well explained 👍</p>

61 <p>Well explained 👍</p>

63 <h3>Problem 3</h3>

62 <h3>Problem 3</h3>

64 <p>A library has acquired a unique collection of CL books and decides to donate XII of them to a local school. How many books remain in the library after the donation?</p>

63 <p>A library has acquired a unique collection of CL books and decides to donate XII of them to a local school. How many books remain in the library after the donation?</p>

65 <p>Okay, lets begin</p>

64 <p>Okay, lets begin</p>

66 <p>The library will have CXXXVIII books remaining. </p>

65 <p>The library will have CXXXVIII books remaining. </p>

67 <h3>Explanation</h3>

66 <h3>Explanation</h3>

68 <p>To find the remaining books, subtract the donated books from the total.</p>

67 <p>To find the remaining books, subtract the donated books from the total.</p>

69 <p>CL = 150</p>

68 <p>CL = 150</p>

70 <p>XII = 12</p>

69 <p>XII = 12</p>

71 <p>150 - 12 = 138</p>

70 <p>150 - 12 = 138</p>

72 <p>138 in Roman numerals is CXXXVIII.</p>

71 <p>138 in Roman numerals is CXXXVIII.</p>

73 <p>Well explained 👍</p>

72 <p>Well explained 👍</p>

74 <h3>Problem 4</h3>

73 <h3>Problem 4</h3>

75 <p>Calculate the sum of LXXXVIII and L using Roman numerals.</p>

74 <p>Calculate the sum of LXXXVIII and L using Roman numerals.</p>

76 <p>Okay, lets begin</p>

75 <p>Okay, lets begin</p>

77 <p>The sum of LXXXVIII and L is CXXXVIII. </p>

76 <p>The sum of LXXXVIII and L is CXXXVIII. </p>

78 <h3>Explanation</h3>

77 <h3>Explanation</h3>

79 <p>Sum is the result of adding two numbers.</p>

78 <p>Sum is the result of adding two numbers.</p>

80 <p>LXXXVIII = 88</p>

79 <p>LXXXVIII = 88</p>

81 <p>L = 50</p>

80 <p>L = 50</p>

82 <p>88 + 50 = 138</p>

81 <p>88 + 50 = 138</p>

83 <p>138 in Roman numerals is CXXXVIII.</p>

82 <p>138 in Roman numerals is CXXXVIII.</p>

84 <p>Well explained 👍</p>

83 <p>Well explained 👍</p>

85 <h3>Problem 5</h3>

84 <h3>Problem 5</h3>

86 <p>A teacher wants to split CCLXXVI worksheets equally among II classes. How many worksheets does each class receive?</p>

85 <p>A teacher wants to split CCLXXVI worksheets equally among II classes. How many worksheets does each class receive?</p>

87 <p>Okay, lets begin</p>

86 <p>Okay, lets begin</p>

88 <p>Each class will receive CXXXVIII worksheets. </p>

87 <p>Each class will receive CXXXVIII worksheets. </p>

89 <h3>Explanation</h3>

88 <h3>Explanation</h3>

90 <p>To find the number of worksheets per class, divide the total worksheets by the number of classes.</p>

89 <p>To find the number of worksheets per class, divide the total worksheets by the number of classes.</p>

91 <p>CCLXXVI = 276</p>

90 <p>CCLXXVI = 276</p>

92 <p>II = 2</p>

91 <p>II = 2</p>

93 <p>276 / 2 = 138</p>

92 <p>276 / 2 = 138</p>

94 <p>138 in Roman numerals is CXXXVIII.</p>

93 <p>138 in Roman numerals is CXXXVIII.</p>

95 <p>Well explained 👍</p>

94 <p>Well explained 👍</p>

96 <h2>FAQs on 138 in Roman Numerals</h2>

95 <h2>FAQs on 138 in Roman Numerals</h2>

97 <h3>1.What is 9 in Roman numerals?</h3>

96 <h3>1.What is 9 in Roman numerals?</h3>

98 <p>IX is 9, as it has smaller numbers following larger ones using the subtraction method. That is X - I, which is 10 - 1 = 9. </p>

97 <p>IX is 9, as it has smaller numbers following larger ones using the subtraction method. That is X - I, which is 10 - 1 = 9. </p>

99 <h3>2.How to write 138 in Roman numerals?</h3>

98 <h3>2.How to write 138 in Roman numerals?</h3>

100 <p>Here, the larger numbers are followed by smaller ones, so we use the addition method. That is C (100) + XXX (30) + VIII (8) = 138. So, CXXXVIII is 138.</p>

99 <p>Here, the larger numbers are followed by smaller ones, so we use the addition method. That is C (100) + XXX (30) + VIII (8) = 138. So, CXXXVIII is 138.</p>

101 <h3>3.What is 146 in Roman Numerals?</h3>

100 <h3>3.What is 146 in Roman Numerals?</h3>

102 <p>146 in Roman Numerals is written as CXLVI. </p>

101 <p>146 in Roman Numerals is written as CXLVI. </p>

103 <h3>4.Is CXXXVIII a prime number?</h3>

102 <h3>4.Is CXXXVIII a prime number?</h3>

104 <p>No, CXXXVIII is not a<a>prime number</a>. Because the<a>factors</a>of 138 are 1, 2, 3, 6, 23, 46, 69, and 138.</p>

103 <p>No, CXXXVIII is not a<a>prime number</a>. Because the<a>factors</a>of 138 are 1, 2, 3, 6, 23, 46, 69, and 138.</p>

105 <h3>5.What are the multiples of 138?</h3>

104 <h3>5.What are the multiples of 138?</h3>

106 <p>The<a>multiples</a>of 138 are 138, 276, 414, 552, and so on.</p>

105 <p>The<a>multiples</a>of 138 are 138, 276, 414, 552, and so on.</p>

107 <h2>Important Glossaries for 138 in Roman Numerals</h2>

106 <h2>Important Glossaries for 138 in Roman Numerals</h2>

108 <ul><li><strong>Addition rule:</strong>The addition method is used when a large number is followed by a smaller numeral, here the values are added. For example, CXXXVIII = C + XXX + VIII = 100 + 30 + 8 = 138.</li>

107 <ul><li><strong>Addition rule:</strong>The addition method is used when a large number is followed by a smaller numeral, here the values are added. For example, CXXXVIII = C + XXX + VIII = 100 + 30 + 8 = 138.</li>

109 </ul><ul><li><strong>Grouping method:</strong>Here, the given numbers are grouped based on their place value and then we convert each group into its Roman numerals. For example, 138 = 100 + 30 + 8 = CXXXVIII.</li>

108 </ul><ul><li><strong>Grouping method:</strong>Here, the given numbers are grouped based on their place value and then we convert each group into its Roman numerals. For example, 138 = 100 + 30 + 8 = CXXXVIII.</li>

110 </ul><ul><li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, XXX = 30 (X is repeated three times to represent the number 30).</li>

109 </ul><ul><li><strong>Repetition rule:</strong>Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, XXX = 30 (X is repeated three times to represent the number 30).</li>

111 </ul><ul><li><strong>Subtraction method:</strong>When a smaller numeral is placed before a larger numeral, it is subtracted. For example, IV = 5 - 1 = 4.</li>

110 </ul><ul><li><strong>Subtraction method:</strong>When a smaller numeral is placed before a larger numeral, it is subtracted. For example, IV = 5 - 1 = 4.</li>

112 </ul><ul><li><strong>Place value:</strong>Understanding the place value helps in breaking down the number for conversion. For example, in 138, the place values are hundreds (100), tens (30), and ones (8).</li>

111 </ul><ul><li><strong>Place value:</strong>Understanding the place value helps in breaking down the number for conversion. For example, in 138, the place values are hundreds (100), tens (30), and ones (8).</li>

113 </ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>

112 </ul><p>What Are Numbers? 🔢 | Fun Explanation with 🎯 Real-Life Examples for Kids | ✨BrightCHAMPS Math</p>

114 <p>▶</p>

113 <p>▶</p>

115 <h2>Hiralee Lalitkumar Makwana</h2>

114 <h2>Hiralee Lalitkumar Makwana</h2>

116 <h3>About the Author</h3>

115 <h3>About the Author</h3>

117 <p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>

116 <p>Hiralee Lalitkumar Makwana has almost two years of teaching experience. She is a number ninja as she loves numbers. Her interest in numbers can be seen in the way she cracks math puzzles and hidden patterns.</p>

118 <h3>Fun Fact</h3>

117 <h3>Fun Fact</h3>

119 <p>: She loves to read number jokes and games.</p>

118 <p>: She loves to read number jokes and games.</p>