Students will add four digit numbers by setting up the problem as column addition, then using disks in a place value chart to visualize addition and regrouping in multiple places
A. Add two 4-digit numbers with and without regrouping in one place using a disk model
B. Add two 4-digit numbers with and without regrouping in two places using column addition and a disk model
C. Add two 4-digit numbers with and without regrouping in one place using a disk model part II
E. Add multi-digit numbers with regrouping in multiple places using column addition
F. Add multi-digit numbers using the standard algorithm