Subtract 3-digit numbers requiring regrouping twice. Transfer the numbers into column format. No hints are provided
A. Subtract 2-digit numbers using the standard algorithm with regrouping
B. Subtract 2-digit numbers using the standard algorithm with regrouping to solve word problems
C. Subtract 3-digit numbers using the standard algorithm with regrouping (Level 1)
D. Subtract 3-digit numbers using the standard algorithm with regrouping (Level 2)
E. Subtract 3-digit numbers using the standard algorithm with regrouping to solve word problems (Level 1)
F. Subtract 3-digit numbers using the standard algorithm with regrouping (Level 3)
H. Subtract 3-digit numbers using the standard algorithm with regrouping to solve word problems (Level 2)