3 ms·
16 x 21 = (16 * 2 * 10) + 16 => (8 * 4 * 10) + 16 => 320 + 16 => 336 Is... that not how most people do mental math? I instinctively reduce everything to famili
by spywaregorilla 3y ago
16 x 21 = (16 * 2 * 10) + 16 => (8 * 4 * 10) + 16 => 320 + 16 => 336
Is... that not how most people do mental math? I instinctively reduce everything to familiar patterns largely based on single digits numbers tables.
563 * 3557 is about 600 * 4000 => 6 * 4 * 100000 => about 2.4M
Are other people doing the standard algorithm visualized somehow?