In Japan, the order of multiplication is discussed online.
How much does it cost to buy five apples for 50 yen each?
At school, 50x5 = 250 is correct, and writing 5x50 = 250 is incorrect.
Many mathematicians say that the order of multiplication is meaningless, but some school teachers do not change their mindset.
@mayuutann This is a horrible thing to do. Japan just lost generations worth of mathematicans with this because there are actually a bunch of kids good in math what make leisure from experimenting with their knowledge making ways to themselves to build new approaches.
This is such a wasted potential
Albert Einstein was actually a kid like this as I learned from his biography. He started playing and then mastering math and wondering about the world's rules in a young age and actually getting terrible qualities in a punishing school system.
@RealPurrplenekoboi >Japan just lost generations worth of mathematicans
Yeah, I think so, too.
Yeah, I respect Einstein too.
@mayuutann Wow. That's a great way to stopping the kids from thinking logically and understanding what multiplication really is, on a fundamental level.
@mayuutann But order of addition does not matter ?
@snowyfox maybe no. At least I've never heard that. maybe some teachers mind only order of multiplication. 🤔
@mayuutann 面し 🤔
@snowyfox yes, 面白い.
@snowyfox I googled this just now. There was!!
@shpuld They only do that on primary school. But people worry about that children will hate math. Because it ’s not wrong, but it ’s wrong.
@mayuutann It happened in Thailand too. 😰
@veer66 Oh, really!? 😅
@mayuutann Yes 😿
@quad I see. 😅
@quad Ahh, he isn't my teacher. This is a discussion that is currently a hot topic in Japan. 😅
@brad yes. Perhaps the teachers who care about the order is to let them do what they taught.
@mayuutann IIRC in Japan you're not allowed to prove your superior wrong, so I'm not surprised.
I mean both have good reasons.
One the one hand: Multiplication within the complex numbers is commutative and therefore the result doesn't change. So the order doesn't matter.
On the other hand: There are many other operators and structures on which multiplication is not commutative (e.g. matrix-matrix multiplication).
Of course for just multiplying with "normal" numbers it's fine to ignore order but in a strict technical sense it doesn't, it just doesn't change the result.
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