4 ms·

Wait, doesn’t everyone know there 1.6 times tables ?

• rocqua 7y ago
  I only had to learn tables up to 10, 11 and 12 were useful to know, but not mandatory.
  • taejo 7y ago
    I had one slightly eccentric teacher who decided that the 25 and 125 times table were also necessary. While I don't know about necessary, I've definitely used that knowledge (possibly more useful to think of them as the one-quarter and one-eighth times tables with a shift). 16 would have also been useful for mi/km conversion and hex/dec conversion.