The Alligator Problem Solving PowerPoint Game is a great resource to practice adding and subtracting two digit numbers. There are fifteen questions in the game. The skills include: addition with regrouping, column addition (three and four two-digit numbers), subtraction with regrouping, and measurement application. First, the teacher reads the question on the slide. Then the teacher gives time for the students to figure it out. On the next slide, the answer is revealed. This activity can be done as a game with the whole class or the students can complete the problems individually on paper or white boards.
Math PowerPoint Games Main Menu: https://www.teacherspayteachers.com/My-Products/Digital-Products/58330