[llamaz]

This is intentional. They're called Arabic numerals for a reason - when they were imported to Europe to replace Roman numerals, they weren't flipped. This is why mental arithmetic is harder than it needs to be.

[mkl]

Nope. These numerals got to Arabic from India, where writing is LTR, and the digit order was unchanged during that transition and the transition to Europe. The order we use is the original order. They're called Hindu-Arabic numerals [1] for a reason, and in Arabic the equivalent [2] are called Indian numbers (أَرْقَام هِنْدِيَّة) [3]!

[1] https://en.wikipedia.org/wiki/Arabic_numerals

[2] https://en.wikipedia.org/wiki/Eastern_Arabic_numerals

[3] https://translate.google.com/?sl=ar&tl=en&text=%D8%A3%D9%8E%...

[llamaz]

I didn't know, thanks for the correction :)

The Arabs must have switched it around then