180 LearnersLast updated on May 26th, 2025
142 in roman numerals
Roman numerals are a 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.
What is 142 in Roman Numerals?
The royal titles, such as Henry I, Henry II, and so on. Have you noticed the names and wondered what these symbols (I and II) represented? Those are the Roman Numerals. Earlier, people used to count using fingers, sticks, bones, etc. When life became complex, a standard form 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.
In Roman Numerals, we use CXLII to represent 142, where C is 100, XL is 40, and II is 2. Let’s learn more about Roman numerals and how we write them.
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Basic Rules for 142 in Roman Numerals
There are certain basic rules to write a number in Roman Numerals. In this section, let’s discuss some basic rules that need to be remembered when writing a number in Roman numerals.
Rule 1: Addition Method
The addition method is used when the smaller number is placed after the larger number. For example, VI → V + I → 5 + 1 = 6.
Rule 2: Repetition Method
To write a larger number, certain Roman Numerals can be repeated up to three times. III → 3.
Rule 3: Subtraction Method
If a small number is followed by a large number in Roman Numerals, we subtract the smaller number from the larger number, called the subtraction method. For example, IX → X - I → 10 - 1 = 9.
Rule 4: Limitation Rule
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 is written as VIII, not IIIIIIII.
How to Write 142 in Roman Numerals
Let’s now learn how to write 142 in Roman Numerals. Follow these methods to write the number in Roman Numerals.
- By Expansion Method
- By Grouping Method
142 in Roman Numeral by Expansion Method
In the expansion method, based on the place value, the number is broken down. In this section, we will learn how to write 142 in Roman numerals using the expansion method.
To write 142 in Roman Numerals, follow the steps:
Step 1: Break the number based on the place value. Place values are tens, hundreds, etc.
For 142, we write it as 100 + 40 + 2.
Step 2: Converting each number into Roman Numerals:
100 in Roman Numerals — C
40 in Roman Numerals — XL
2 in Roman Numerals — II
Step 3: Combine the Roman Numerals together.
Therefore, 142 in Roman Numerals is C (100) + XL (40) + II (2) = CXLII.
142 in Roman Numeral by Grouping Method
When writing a large number into Roman Numeral, we group the number. To write 142 in Roman Numerals, we group 142 as 100 + 40 + 2.
100 in Roman Numerals — C
40 in Roman Numerals — XL
2 in Roman Numerals — II
Thus, 142 is written as CXLII in Roman Numerals.
Numbers Related to 142 in Roman Numerals
Roman Numerals follow a certain pattern, making them look similar. In this section, we will learn some numbers related to the Roman numeral 142.
| Number | Roman Numeral | Breakdown |
|---|---|---|
| 140 | CXL | 100 + (50 - 10) = 140 |
| 141 | CXLI | 100 + (50 - 10) + 1 = 141 |
| 142 | CXLII | 100 + (50 - 10) + 2 = 142 |
| 143 | CXLIII | 100 + (50 - 10) + 3 = 143 |
| 144 | CXLIV | 100 + (50 - 10) + 4 = 144 |
| 145 | CXLV | 100 + (50 - 10) + 5 = 145 |
| 146 | CXLVI | 100 + (50 - 10) + 6 = 146 |
| 147 | CXLVII | 100 + (50 - 10) + 7 = 147 |
| 148 | CXLVIII | 100 + (50 - 10) + 8 = 148 |
| 149 | CXLIX | 100 + (50 - 10) + 9 = 149 |
Common Mistakes and How to Avoid Them in 142 Roman Numerals
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.
Mistake 1
Errors in the repetition method
The repetition method can be confusing for beginners as it states that Roman Numerals cannot be repeated more than three times. In contrast, some of the Roman Numerals such as V, L, and D cannot be repeated.
Mistake 2
Subtracting the wrong numerals
Confusing the subtraction method, the subtraction method is used when a smaller number follows the higher value. For example, writing IC for 99 instead of XCIX.
Mistake 3
Incorrect grouping
When writing a large number in Roman Numerals, we should group the number correctly. For example, writing 6 as IIIIII instead of VI.
Mistake 4
Confusing with Arabic and Roman Numerals
Students tend to be confused with Arabic and Roman Numerals. To avoid such errors, students need to understand the basic concepts. Arabic numbers are the numbering system using 1, 2, 3,... whereas Roman Numerals use symbols such as I, V, X, L, etc.
Mistake 5
Confusing subtraction and addition
Students are confused by the addition and subtraction methods. When the large number follows the small one, we use the addition method; when the smaller number follows the large number, we use the subtraction method. For example, IV = V I = 5 1 = 4, whereas XV is 15, as X(10) + V(5) = 15.
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142 in Roman Numerals Examples
Problem 1
A historian is transcribing ancient texts and comes across the number CXXII. If he adds XX to it, what will be the result in Roman numerals?
The result of adding CXXII and XX is CXLII.
Explanation
CXXII is 122 and XX is 20. Adding these gives 122 + 20 = 142. In Roman numerals, 142 is written as CXLII.
Problem 2
An archaeologist finds a collection of MCDXLVIII artifacts and wants to distribute them equally among X groups. How many artifacts will each group receive?
Each group will receive CXLIV artifacts.
Explanation
MCDXLVIII is 1448. Dividing 1448 by 10 gives 144.8, which is simplified as 144 in whole numbers. In Roman numerals, 144 is CXLIV.
Problem 3
Calculate the product of XIV and X using Roman numerals.
The product of XIV and X is CXL.
Explanation
XIV represents 14 and X represents 10. The product of 14 × 10 is 140. In Roman numerals, 140 is written as CXL
Problem 4
A collector has a collection of CXLII coins. If he gives away XXII coins, how many coins will he have left?
He will have CXX coins left.
Explanation
CXLII is 142 and XXII is 22. Subtracting these gives 142 22 = 120. In Roman numerals, 120 is written as CXX.
Problem 5
Convert the sum of LXX and LXXII into Roman numerals.
The sum of LXX and LXXII is CXLII.
Explanation
LXX is 70 and LXXII is 72. Adding these gives 70 + 72 = 142. In Roman numerals, 142 is written as CXLII.
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FAQs on 142 in Roman Numerals
1.What is 40 in Roman numerals?
2.How to write 142 in Roman numerals?
3.What is 146 in Roman Numerals?
4.Is CXLII a prime number?
5.What are the multiples of 142?
6.How can children in United States use numbers in everyday life to understand 142 in roman numerals?
7.What are some fun ways kids in United States can practice 142 in roman numerals with numbers?
8.What role do numbers and 142 in roman numerals play in helping children in United States develop problem-solving skills?
9.How can families in United States create number-rich environments to improve 142 in roman numerals skills?
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Important Glossaries for 142 in Roman Numerals
- Addition Rule: The addition method is used when a larger number is followed by a smaller numeral, and the values are added. For example, VI = V + I = 5 + 1 = 6.
- Grouping Method: Here, the given numbers are grouped based on their place value and then converted into Roman numerals. For example, 142 = 100 + 40 + 2 = CXLII.
- Repetition Rule: Certain symbols (I, X, C, M) in the Roman numeric system can be repeated only up to three times. For example, III = 3 (I is repeated three times to represent the number 3).
- Subtraction Method: The subtraction method is used when a smaller numeral precedes a larger one, indicating subtraction. For example, IX = X I = 10 1 = 9.
- Limitation Rule: Some symbols like V, L, and D cannot be repeated in the Roman numeral system. For example, instead of writing VV for 10, we use X.
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Hiralee Lalitkumar Makwana
About the Author
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.
Fun Fact
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