I've read that societies that used such a system for counting used base 12 (instead of base 10), and had names for one digit representations of numbers 10 and 11.

Such as system allows for quarters and thirds to be whole numbers, and is much more powerful once you get used to it.

Many of our numbers come from merges between the two base systems (12 hour days, 12 inch foot, etc.)

To clarify, I was taught that the reason we use base 10 is that we have ten fingers. In societies that used a twelve jont counting from a young age, they use base 12. I suspect that the reason that most people find subtraction harder than addition is that they have been doing addition from a younger age.