Standard Algorithm Multiplication, Traditional Algorithm Worksheets: Using the standard algorithm, both with and without regrouping. Students will practice multiplying 2-digit by 2-digit factors. Answer Key Included. This resource comprises 37 pages of worksheets, answer keys, and a Student's Multiplication Challenge Template. It provides 2 sets of worksheets, one with a grid for easier multiplication and one without a grid These worksheets are perfect for small groups, intervention, centers