Students are guided through the standard algorithm of 2-digit column addition with regrouping into the hundreds. Less support is provided as students deepen their understanding
A. Exchange 1s for 10s and 10s for hundreds on a place value chart. Write the corresponding number
B. Solve addition problems involving exchanging 1s and 10s using a place value chart for support
C. Practice column addition with exchanging alongside a place value chart
D. Use the standard algorithm of 2-digit column addition with regrouping into the hundreds (Part 1)
F. Use the standard algorithm to solve for various combinations of addends of 2 or 3 digits and with or without regrouping into the hundreds