Students use a place value chart to represent two-digit addition problems with exchanging of 1s and 10s and walk through the equivalent steps in column addition using the standard algorithm
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
D. Use the standard algorithm of 2-digit column addition with regrouping into the hundreds (Part 1)
E. Use the standard algorithm of 2-digit column addition with regrouping into the hundreds (Part 2)
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