News for hackers. Stuff that matters.
Re:In Math Cram Sessions, Solving for Why by Koshkin on Monday September 10, 2018 @01:30PM (#17953459)
Spending time memorizing the multiplication table, then, is more efficient on both accounts: you will not need to do "a lot of multiplications" to begin with, and it takes less time for your brain to "cache the results".
Re:In Math Cram Sessions, Solving for Why by abecedarius on Monday September 10, 2018 @05:07PM (#17955212)
Maybe that works best for some people, but as a kid I didn't do it. I used a printed multiplication table while tackling some more-interesting problems[0], and let the table soak in as a byproduct. It went quickly and did not turn me off on math for life. Paul Lockhart in Arithmetic also recommended this.

[0]: Multiplying two-digit numbers by one-digit, and that sort of thing. Lockhart had more artistic pursuits in mind.

(An obvious reason this might not apply: I was more talented than my grade-school peers. But most kids would learn arithmetic better if not forced to before they're ready, and then the talent difference would matter less.)