Great explanation and very easy to follow!
I remember one day our Math teacher trick us by doing all sort of weird calculations in which he "demonstrated" that 2+2 could be = 5.
I know he must have made some quick trick but we weren't able to catch it, I will always remember that because every calculation he did made completely sense, and the final result was that indeed 2+2 = 5...
I wish I could remember how he did it, but that must have been a trick for sure.
I like such teachers that make learning fun. Most people thought maths was tough due to the teacher that taught them the basics. If it's a lively teacher that does all those tricks in classes, learning can then be fun.