Students add two 2-digit numbers (without using models) by adding ones to ones and tens to tens
A. Add tens numbers (Level 1)
B. Add tens numbers (Level 2)
C. Subtract tens numbers (Level 1)
D. Subtract tens numbers (Level 2)
E. Solve addition problems with 2-digit numbers and tens numbers (Level 1)
F. Solve addition problems with 2-digit numbers and tens numbers (Level 2)
G. Solve addition problems with two 2-digit numbers (Level 1)
H. Solve addition problems with two 2-digit numbers (Level 2)
J. Solve addition problems with two 2-digit numbers, including regrouping