[Cushman]

You get utility from knowing your times tables proportionally to how often you use them. The difference between the amount of time and energy it took you to memorize them deliberately and the amount of time you would spend manually multiplying until you learned them organically defines whether or not that was a useful thing for you to do.

[cma]

Wouldn't you learn it organically as you used it? Why memorize the whole thing at once and not just learn through actual use?

[Cushman]

I realize that last sentence is a mouthful, but yes, that's what I'm saying :)