godan verb (-u), intransitive verb
be wrong; be mistaken; be incorrect
Intransitive; describes a state of being wrong. Often used in the forms 間違っている or 間違った to mean 'is wrong' or 'was wrong/mistaken'.
その答えは間違っている。
That answer is wrong.
彼の言ったことは
What he said was mistaken.
godan verb (-u), transitive verb
make a mistake; do incorrectly; get wrong
Transitive; used when someone makes an error in an action or process. The thing done wrong is marked with を.
計算を間違ってしまった。
I made a mistake in the calculation.
手順を間違わないように注意してください。
Please be careful not to get the procedure wrong.
godan verb (-u), transitive verb
mistake A for B; confuse
Transitive; used when confusing one thing with another. Often appears with ～と～を間違う or ～を間違えて～する.
彼女は私を弟と間違った。
She mistook me for my younger brother.
塩と砂糖を間違って入れてしまった。
I accidentally confused salt with sugar and put it in.