Students have more practice solving 2- and 3-digit column subtraction equations within 200. They rewrite a horizontal equation as column subtraction, then solve by making exchanges into the 10s and 100s
A. Solve 2- and 3-digit column subtraction equations by exchanging 100 for 10 tens to solve
B. Solve more 2- and 3-digit column subtraction equations by exchanging 100 for 10 tens with or without prompts
C. Solve 2- and 3- digit column subtraction equations with and without exchanging into the hundreds
D. Solve 2- and 3-digit column subtraction equations by exchanging into the 10s and 100s (Level 1)
F. Solve 2- and 3-digit column subtraction equations by exchanging into the 10s and 100s (Level 3)
G. Solve 2- and 3-digit column subtraction equations with and without exchanging into the hundreds and tens