Students use a place value chart to represent two-digit addition problems with exchanging of 1s and 10s. Then, students write the final result
A. Exchange 1s for 10s and 10s for hundreds on a place value chart. Write the corresponding number
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)
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