Yeah that’s why i say the Belgian and Swiss ways are better, their French speakers have dedicated words for 70 80 90.
That being said I not sure but I guess in a lot of languages those words just mean 7x10 8x10 9x10 … we understand base 10 better but that’s still a calculation in disguise, historically (and still in some cultures?) base 10 isn’t the norm (hence the 4x20 among others).
Yeah that’s why i say the Belgian and Swiss ways are better, their French speakers have dedicated words for 70 80 90. That being said I not sure but I guess in a lot of languages those words just mean 7x10 8x10 9x10 … we understand base 10 better but that’s still a calculation in disguise, historically (and still in some cultures?) base 10 isn’t the norm (hence the 4x20 among others).