As an intervention teacher, my kiddos struggle with regrouping rules in addition and subtraction. I created this game/worksheet for them to do in partner pairs as a center. They roll the two dice and write the dots as a double digit number. They roll a second time and record the number then tell me if they must regroup or not! This is an excellent way to review regrouping by getting students to really look at the problems. The included pages can easily be adapted into a subtraction activity. BONUS: This can also serve as a place value review. By getting a second die in a different color, you can designate which color is the tens and which is the ones. So many possibilities!