Yes we were!
well other people were, I had a complete blank when it came to the daily Mental Arithmetic sessions in primary school - the teacher might as well have been reading out the telephone directory, the sounds and the numbers didn't link up in my head.
Long after I left school I learnt it's dyscalculia.🙄
But apart from me, people used to be so incredibly good at working out numbers, even when they were expressed in 12 pennies/20 shillings/16 ounces/14 pounds etc.
I asked my mother, who worked in a shop, how they worked out how much change to give etc., so quickly and so accurately - she said the accuracy was because any shortfall came out of your meagre wages, so there was a massive incentive to get the calculations dead right first time!
It's a lost skill, and I bet if they did brain scans of a primary school kid in the 60s and a uni student in 2026, they'd find the kid's brain would have much more working connections.
ps I've just seen Spaniel's post - great to hear you got through it with not too much damage