Students practice the standard algorithm for addition of 2-digit addends with regrouping. Less support is provided as students deepen their understanding
A. Identify and build numbers using 10s and 1s on a place value chart
B. Use a place value chart to add 2-digit numbers
C. Solve 2-digit column addition without exchanging using a place value chart model
D. Add 2-digit numbers without exchanging (Part 1)
E. Add 2-digit numbers without exchanging (Part 2)
F. Exchange 1s for 10s on a place value chart when necessary
G. Solve 2-digit column addition with regrouping with the support of a place value chart model
H. Solve 2-digit column addition with regrouping using the standard algorithm
I. Add 2-digit numbers with exchanging (Part 1)
J. Add 2-digit numbers with exchanging (Part 2)
K. Practice the standard algorithm for addition with regrouping with step by step support (Part 1)
M. Practice column addition with one 3-digit and one 2-digit addend
N. Practice the standard algorithm of 2-digit column addition with regrouping (Part 1)
O. Practice the standard algorithm of 2-digit column addition with regrouping (Part 2)