The number 43 in Roman numerals is written XLIII. Roman numerals are an ancient numbering system used in Rome, where letters such as I, V, X, L, C, D, and M represent numbers.
Roman numerals are still commonly seen today on clocks, monuments, movie titles, and in the numbering of events. 43 combines the subtraction rule for 40 (XL = 50 - 10) and the addition rule for 3 (III = 3). Together XL + III = XLIII, which is equal to 43.
In this article, we learn how to write 43 in Roman numerals, explore related numbers, see the solved examples, and learn fun facts for simple understanding.
Step by step:
Break 43 into parts: 43 = 40 + 3
Convert to Roman numeral: 40 = XL, 3 = III
Combine: 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  | 
 Just 50  | 
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, ... 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.
1. Why is 43 written as XLIII and not IL?
Answer: IL is incorrect because Roman numerals follow specific subtraction rules. 40 is written as XL (50 - 10), and then 3 is added: XLIII.
2. What is the Roman numeral just before XLIII?
Answer: XLII (42) comes just before XLIII.
3. What is the Roman numeral immediately after XLIII?
Answer: XLIV (44) comes immediately after XLIII.
4. How do you write 143 in Roman numerals?
Answer: 143 = 100 + 40 + 3 = C + XL + III = CXLIII
5. What is an easy way to remember 43 in Roman numerals?
Answer: Think of 43 as 40 (XL) + 3 (III). Combine them: XLIII
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