Students will use base-10 cubes to model subtraction from a two-digit number. They will break the two-digit number into tens and ones and model subtraction by taking away from the tens place. Students will solve similar equations without models
A. Review addition facts with a sum of 10
B. Adding to groups of ten
C. Use models to practice addition equations with a one- and two-digit addend
D. Solve addition equations with a one- and two-digit addend
E. Use models to solve subtraction equations with a one- and two-digit number
F. Solve subtraction equations with a one- and two-digit number
G. Add groups of ten to a two-digit number (Part 1)
H. Adding one- and two-digit numbers
J. Add groups of ten to a two-digit number (Part 2)
K. Develop fluency with addition and subtraction of one- and two-digit numbers
L. Pretest. Initiating Fluency with Addition and Subtraction Within 100