I love this “One Incorrect” Order of Operations Activity that was shared by Greta Bergman.

Students are given 8 expressions. 7 of the expressions simplify to -13. 1 of them doesn’t.

I challenge students to complete problems until they find the one that doesn’t equal -13. I tell them that when they find that one, they may stop. Of course, they have to get their work checked by me.

Students are always eager to get their work checked when they get an answer that isn’t -13. Usually, I find some error in their work, point it out to them, and send them back to re-work the problem. So, they end up getting LOTS of practice!

## More Order of Operations Teaching Resources

- Eights Challenge
- Sevens Number Challenge
- Order of Operations Puzzles
- 12-25 Christmas Number Challenge
- Sixes Number Challenge
- Fives Challenge Puzzle
- Fours Challenge Puzzle
- Twos Challenge
- Make 30 Puzzles
- Order of Operations Question Stack Activity
- Missing Parentheses – An Order of Operations Activity
- Order of Operations Practice Worksheet