CalcuLadder® 2 includes drill Levels 17 through 32, which cover advanced addition and subtraction and basic multiplication. Levels 17-23 cover multi-column addition and subtraction, including problems with carrying and borrowing, additon prob­lems with more than two add­ends, and so on. Levels 24-32 include comprehensive drill on multiplication tables through the “9’s”, with a special drill on telling time! The drill Levels add new facts while reviewing previous ones. Use CalcuLadder 2 in Grades 2, 3, 4, or higher as needed to get advanced addition and subtraction down pat and basic multiplication facts down cold!