I am forever thankful I memorized common math answers for the simple, everyday math occurrences.Unfortunately, drill and repetition is the most optimal way to learn basic math, quickly and efficiently.
That's frowned upon, if not deemed white privilege/supremacist in our sleep-woke school admins.
I'd like to thank the teachers who made me write out the times tables after school on the blackboard as punishment for excessive "not paying attention in class".