Timeline for Why is multiplication taught using cross notation at first?
Current License: CC BY-SA 3.0
4 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Feb 15, 2018 at 22:11 | comment | added | Daniel R. Collins | My theory is that multiplication is the most common operation, hence removing the sign from factors is maximally concise (generally the point of algebraic notation in the first place). | |
| Feb 14, 2018 at 20:01 | comment | added | beroal | @Džuris: I can't help but notice that apples are not numbers. | |
| Feb 13, 2018 at 19:01 | comment | added | Džuris | I believe juxtaposition follows from language. You don't say "three times an apple" or "multiply three and an apple". You just advertise "three apples are two bucks" => $3a = 2$. | |
| Feb 13, 2018 at 14:58 | history | answered | beroal | CC BY-SA 3.0 |