3rd Grade Addition & Subtraction Extensions and ChallengesThis product was designed for advanced/gifted students to explore the topic of addition and subtraction at a deeper thinking level. Great for small group extensions, seat work, independent work for early finishers, and activities for students who demonstrate mastery on pretest.**Includes Answer Keys**5 Daily Extension Activities:- Puzzlers - Solve number puzzles using addition skills of multiple 2 digit numbers- Fix the Errors (2 part