Lesson Introduction to Roman Numerals

Source code of 'Introduction to Roman Numerals'

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Chapter 1: Zero
0 was not in the Roman numeral system. Nulla (also called none) was then introduced to be added into the system, representing 0. In 725 A.D., Bede the Venerable created a Roman numeral for 0, which is N. N is a first initial of nulla/nihil, and that's how 0 was N in the Roman numeral system.

Chapter 2: Standard Roman Numerals
The standard Roman numerals are numerals that are in the system (the modern version of the system). For example, I is a numeral for 1. Then goes to II, being a 2. It becomes a 2 when you add I and I together (you can put it like this: 1 + 1). III is 3 (I + I + I = 1 + 1 + 1 = 3).

V is a numeral for 5 according to the system. Between III and V, its IV (4). Do not mistake IV as 6, VI is 6. Imagine IV meant you subtracted I from V (5 - 1) instead of adding, you would get 4 as IV.

As we go higher in number value, X is a numeral for 10, and IX is a numeral for 9 (remember the method for subtracting). When you reach 50, L would be a numeral for 50. XLIX is 49. To get XLIX, we know that X = 10, L = 50, and I = 1. XL is 40 (50 - 10 or L - X). Leave XL alone and focus on IX. Again, IX is 9 when subtracting I from X. Now add the numbers together: XL + IX = 40 + 9 = XLIX or 49. C is 100 and D is 500. Then we reach M: a numeral for 1000.

(Chapter 3 Coming Soon once I reach 25 solves!)
(Chapter 4 Coming Soon once I reach 40 solves!)
(Chapter 5 Coming Soon once I reach 55 solves!)
(Chapter 6 Coming Soon once I reach 70 solves!)
(Chapter Check-Up 1 Coming Soon once I reach 90 solves!)