Students solve 5-digit column subtraction equations with multiple instances of regrouping
A. Use column subtraction with multi-digit numbers
B. Solve 4-digit column subtraction with regrouping (Level 1)
C. Solve 4-digit column subtraction with regrouping (Level 2)
D. Write and solve multi-digit column subtraction
E. Write and solve multi-digit column subtraction with regrouping