Practice subtracting three- and four-digit numbers from four-digit numbers with regrouping, using the standard algorithm, this time without the help of a place value chart
A. Subtract two 4-digit numbers with and without regrouping in two places using column subtraction and a disk model
C. Subtract multi-digit numbers with regrouping across zeros using column subtraction
D. Subtract multi-digit numbers using the standard algorithm
E. Pretest. Finding the Area and Perimeter of a Rectangle