diff --git a/guide/english/mathematics/hexadecimal-number-system/index.md b/guide/english/mathematics/hexadecimal-number-system/index.md
index 199b72c7858..1ecd4b44fb7 100644
--- a/guide/english/mathematics/hexadecimal-number-system/index.md
+++ b/guide/english/mathematics/hexadecimal-number-system/index.md
@@ -5,7 +5,53 @@ title: Hexadecimal Number System
Hexadecimal number system is a numbering system that uses base 16. Hexa = 6 and decimal = 10, combination of 'hexa' and 'decimal' gives use the base 16 number system. The numbers in hexadecimal are: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 = A, 11 = B, 12 = C, 13 = D, 14 = E and 15 = F.
The hexadecimal number system is very useful in the field of computing like Cryptography.
+## Adding Hexadecimal Numbers:
+
+Adding hex numbers are just like adding decimal with a twist.
+
+Lets look at the example below:
+```
+ 0x14
++0x10
+______
+ 0x24
+ ```
+
+`4 + 0 = 4` and `1 + 1 = 2`. Simple, right?
+
+ How about when there is a carry over?
+ ```
+ 0x1A
+ + 0x1B
+ _______
+ 0x
+```
+
+`A(10) + B(11) = 21`. `21 % 16 = 5`.
+
+```
+ 1
+ 0x1A
+ + 0x1B
+ _______
+ 0x 5
+```
+Now, `1 + 1 + 1 = 3`. Thus,
+
+```
+ 1
+ 0x1A
+ + 0x1B
+ _______
+ 0x35
+```
+
+When there is a carry over in hex (meaning two numbers adding together is greater than 15), mod the number by 16 and carry a one over.
+This is analogous to the decimal system.
+
#### More Information:
-Wikipedia
+- Wikipedia
+- [Hex Calc](https://www.calculator.net/hex-calculator.html)
+