Lyxar
650 posts
This kind of stuff frustrated me so much, both as a student and a parent. This is a perfectly good question from a workbook — not a trick question. The student got the correct answer as intended by the workbook writer, and the teacher was clearly wrong. Happens a lot.
Sadly, the replies are filled with people who also don't understand.
Rothmus 🏴@Rothmus
Super smart educator right there.
English
@JAMsandwich4100 @XGillerdenBiri @mathsrick_ except the fucking exponent has a higher order of operations, so you subtract 5 squared in the bracket
if you want -5^2 to result in +25 you need to write (-5)^2 so you actually square -5
English
@XGillerdenBiri @mathsrick_ -5² = 25
So therefore the answer is 0.
English
@WXtroid @BielMenHaha @mathsrick_ except the fucking exponent has a higher order of operations, so you subtract 5 squared in the bracket
if you want -5^2 to result in +25 you need to write (-5)^2
so you actually square -5
English
@BielMenHaha @mathsrick_ Wrong. -5^2 = +25. Negative times negative equals positive.
The answer is 0
English
@violet_050224 @RiaryAme @hisagrmf Maybe everyone in Japan has supreme education and everyone always payed attention in school for everything all the time - couldnt say, I dont live there
but I guess its hard to argue across two languages with twitter translation, so we are probably just talking past each other
English
@violet_050224 @n_vadimov @hisagrmf Yeah, it is compulsory education
that takes literally nothing away from my point
thats like saying "oh its common sense that X happened in year Y" (history education)
that just doesnt make sense linguistically
it may be common KNOWLEDGE, but not common SENSE.
English
@lyxxar @n_vadimov @hisagrmf 外国のことは分からんな、とは思ったからお返事するね。日本人は中学校（義務教育）で習うんよ。
義務教育の内容は、基本的には常識として扱って問題ないと、私は思うんよ。それを「知らない」のは…（以下略
特に数学は、音楽や美術みたいに、先生の趣味には左右されないからね。
日本語
@RiaryAme @violet_050224 @hisagrmf Yeah, its not difficult to spot
but if you never heard of "sum of digit" why would you look
English
@n_vadimov @violet_050224 @hisagrmf Exactly? Thats not common sense, thats math knowledge, useless one at that.
it stops being "common sense" when you dont remember that from school X years ago
English
Русский
@violet_050224 @hisagrmf and you are B aswell, since its only common sense to you because you know the math facts
English
@hisagrmf 「説明下手なＢがヤバい」…という話をしたいんだろうけど、
例えが一般常識すぎて、
「頭悪いAがヤバい」にしか読めない。
日本語
@KelleyKga 10-1? What do you mean 10-1?
This surely was not a test in the 10th grade?
English
As I expected, the question meant exactly what it said, it wasn't a trick, and the student answered perfectly. Thanks to Ethan for tracking down the answer key! x.com/etekweb/status…
Ethan@etekweb
@KelleyKga @Rothmus Can confirm - I was able to find an answer key online from a teacher's website for the entire worksheet: jessicamorrill.weebly.com/math-answers/p… Clearly written in the last screenshot is the correct answer for this question: "Marty's pizza was larger than Luis's"
English
@lyxxar Ich hab alles voll gekotzt war keine gute Idee
Deutsch
