Last updated on May 26th, 2025
To meet their daily commerce and administration needs, the ancient Romans developed Roman Numerals. It used a combination of seven symbols — I, V, X, L, C, D, and M to represent numbers. Roman numerals were used to record transactions, keep track of data, and label military units. In this topic, we are going to learn about the Roman numeral CCCLVIII.
Ancient Romans discovered that counting fingers could get very complicated after 10. So to overcome the complexity, the Roman numeric system was developed.
This was widely used throughout Europe as a standard writing system until the late Middle Ages. Seven symbols are used to represent numbers in the Roman numeric system — I, V, X, L, C, D, and M.
The numerals are made up of different combinations of these symbols. CCCLVIII in Roman numerals can be written in number form by adding the values of each Roman numeral, i.e., CCCLVIII = 358.
Let us learn more about the Roman numeral CCCLVIII, how we write them, the mistakes we usually make, and ways to avoid these mistakes.
When writing Roman numerals, there are a few rules that we need to follow based on the Roman numerals we are trying to write. In this section, we will learn about the rules when writing Roman numerals and how to represent them.
When a larger symbol is followed by a smaller symbol, we add the numerals to each other. For example, in VIII, we have 5 + 3 = 8.
A symbol that is repeated three times in continuation increases the value of the numeral. For example, CCC = 300.
We use the subtraction method when a larger symbol follows a smaller symbol. For example, XL = 40 (which is 50 – 10).
Symbols cannot be repeated more than three times, and some symbols, such as V, L, and D, cannot be repeated more than once. For example, 10 is represented as X and not VV.
Let us learn about how to write CCCLVIII in Roman numerals. There are two methods that we can use to write Roman numerals:
The breaking down of Roman numerals into parts and then converting them into numerals is what we call the expansion method. The expansion method is the breaking down of Roman numerals into numerical form and adding them to get the final number.
Step 1: Break the Roman numerals into parts.
Step 2: Now write each of the Roman numerals with its numerical digit in the place value.
Step 3: Add the numerals together. For CCCLVIII,
Step 1: First we break the Roman numerals. CCCLVIII = C + C + C + L + V + I + I + I
Step 2: Write the Roman Numerals for each part The Roman Numeral C is 100 The Roman Numeral L is 50 The Roman Numeral V is 5 The Roman Numeral I is 1
Step 3: Combine all the numbers C + C + C + L + V + I + I + I = 100 + 100 + 100 + 50 + 5 + 1 + 1 + 1 = 358. Therefore, the Roman Numeral CCCLVIII is 358.
Using subtraction and addition rules, we will apply the grouping method. This means we break the Roman numerals into smaller groups, which makes it easier to work with. This method groups the Roman numerals logically, and then we write the numbers for each group.
Step 1: Take the largest number and write the number for that Roman numeral.
Step 2: Write the Roman numeral using the subtraction and addition rules. Example: Let’s take the Roman numeral CCCLVIII.
Step 1: The larger Roman numerals are what we will begin with. Once split, the Roman numerals we get are CCC, L, and VIII. The numeral for CCC is 300.
Step 2: Now we need to either add or subtract the smaller number, depending on its place. Here we add L, V, and III to CCC, and we will get CCCLVIII. The Roman numeral L is 50, the Roman numeral V is 5, and the Roman numeral III is 3.
Therefore, the numeral of CCCLVIII is 358.
Students can make mistakes when studying Roman numerals. Here are a few common mistakes students make, and ways to avoid them.
Calculate the sum of CCCLVIII + XLII. Write the answer in Roman numerals.
The sum is CD
Convert both Roman numerals into their decimal form:
CCCLVIII = 358
XLII = 42
Now add both numbers: 358 + 42 = 400
Convert 400 into its Roman numeral: 400 = CD
What is the result of subtracting CL from CCCLVIII? Write in Roman numerals.
The result is CCVIII
Convert the Roman numerals into their decimal form:
CCCLVIII = 358
CL = 150
Now subtract the numbers: 358 - 150 = 208
Convert 208 into its Roman numeral: 200 (CC) + 8 (VIII) = CCVIII
Divide CCCLVIII by 2 and write the answer in Roman numerals.
CLXXIX
Convert CCCLVIII into its decimal form:
CCCLVIII = 358
Divide by 2: 358 / 2 = 179
Write 179 in Roman numerals: 100 (C) + 70 (LXX) + 9 (IX) = CLXXIX
Find the product of CCCLVIII and III.
MLXXIV is the product of CCCLVIII and III.
Write CCCLVIII and III in numbers:
CCCLVIII = 358
III = 3
Multiply the numbers: 358 × 3 = 1074
Convert 1074 into its Roman numerals: 1000 (M) + 70 (LXX) + 4 (IV) = MLXXIV
Convert CCCLVIII into its decimal form.
In decimal form CCCLVIII is 358
Break CCCLVIII into components:
CCC = 300
L = 50
VIII = 8
Add values: 300 + 50 + 8 = 358
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.
: She loves to read number jokes and games.