How to say "she short changed me" (without negative conotation)? For example, if I went to the bank to withdraw money from my account and my account showed I took out $50, but the bank teller only gave me $40. I don't want to imply the bank teller was trying to cheat me or had bad intentions, I just want to say that she "shorted" or "short-changed" me by $10.
You can say:

你少给了我10块钱。

Pinyin: nǐ shǎo gěi le wǒ shí kuài qián

Be sure to show the bank teller the money he/she gave you.