When my mom died, my sister, brother and I cleared out some closets in the back of what had been our family grocery store. In one, I found the old ledger book that my father used to keep his finances straight when he ran the store.
Back then the only computer available was in his head. And despite the fact that math has always been a skill glaring in its absence among me and my siblings, the one skill that seems to have survived through multiple generations was the ability to add and subtract in our heads. Granted, calculators have