43 in Roman numerals is written as XLIII, a classic number system used by the ancient Romans. To convert 43, we express it in expanded form: 43 = (50 - 10) + (1 + 1 + 1). Replacing these values with Roman symbols gives (L - X) + (I + I + I) = XLIII. Learning how to read and write numbers like 43 in Roman numerals helps students understand how subtraction and addition rules apply in forming numbers. It also supports logical thinking by showing how smaller values combine to form a complete numeral. The study of XLIII is more than just math; it connects learners to history, making number learning richer, more meaningful, and more engaging.
Table of Contents

To write 43 in Roman numerals, we break it down into its expanded form and convert each part into its corresponding Roman symbol.
Step-by-step:
Break the number:
43 = 40 + 3
Convert each part to Roman numerals:
40 = XL (because 50 - 10)
3 = III
Combine the values:
43 = XL + III = XLIII
|
Number |
Roman Numeral |
Explanation |
|
40 |
XL |
50 - 10 |
|
41 |
XLI |
40 + 1 |
|
42 |
XLII |
40 + 2 |
|
43 |
XLIII |
40 + 3 |
|
44 |
XLIV |
40 + (5 - 1) |
|
45 |
XLV |
40 + 5 |
|
46 |
XLVI |
40 + 6 |
|
47 |
XLVII |
40 + 7 |
|
48 |
XLVIII |
40 + 8 |
|
49 |
XLIX |
40 + (10 - 1) |
|
50 |
L |
50 |
Know more about related topics:
Example 1: Write 43 in Roman numerals.
Solution:
43 = 40 + 3 = XL + III = XLIII
Example 2: Add XX (20) and XXIII (23). Write in Roman numerals.
Solution:
20 + 23 = 43 = XLIII
Example 3: Subtract VII (7) from L (50).
Solution:
50 - 7 = 43 = XLIII
Example 4: Multiply XI (11) by IV (4).
Solution:
11 × 4 = 44 = XLIV
Example 5: A box includes XX (20) pens and XXIII (23) pencils. How many goods in total?
Solution:
20 + 23 = 43 = XLIII
XLIII = 43: XL = 40 (subtraction), III = 3 (addition).
Roman numerals are still used in clocks, event numbers, and book chapters.
The numbers in the 40s follow a simple pattern: 40 = XL, 41 = XLI, 42 = XLII, 43 = XLIII, till 49 = XLIX.
1. Write 43 in Roman numerals.
2. Add XX (20) and XXIII (23). Express the result in Roman numerals.
3. Subtract XL (40) from LXXXVII (87). Write in Roman numerals.
4. Multiply III (3) by XIV (14). Express the result in Roman numerals.
5. Write the next five numbers after 43 in Roman numerals.
43 in Roman numerals is written as XLIII, where XL represents 40 and III represents 3. By breaking the number into parts and applying the rules of addition and subtraction, students can easily understand how Roman numerals are formed. Learning numbers like 43 in Roman numerals strengthens number sense, improves logical thinking, and builds confidence in working with different number systems. With regular practice, students can quickly read, write, and apply Roman numerals in daily life, from clocks and books to important historical references.
Learn 43 in Roman numerals in a simple breakdown style with worksheets from Orchids International School.
Answer: IL is incorrect because Roman numerals follow specific subtraction rules. 40 is written as XL (50 - 10), and then 3 is added: XLIII.
Answer: XLII (42) comes just before XLIII.
Answer: XLIV (44) comes immediately after XLIII.
Answer: 143 = 100 + 40 + 3 = C + XL + III = CXLIII
Answer: Think of 43 as 40 (XL) + 3 (III). Combine them: XLIII
CBSE Schools In Popular Cities