Adding with regrouping can be a challenge. Having a way for students to self check their practice is great for error analysis and critical thinking. This is a great product to allow students to practice the skills of adding with regrouping and build their confidence to check their own work! See the full product preview below. More Great Products from Kile's Classroom Addition of Larger Numbers. Subtraction with Regrouping. Rounding to Tens and Hundreds. Adding with Regrouping Problem Trail.