Find sums and differences within 100 across tens. Enter the answer the equation. No models are given
A. Identify a missing single-digit addend to reach the next round number with and without a model of base-10 blocks
B. Identify a missing addend to reach a sum of 20 with and without a model of base-10 blocks
C. Solve +/- equations that do not cross a ten based on a number line model
D. Solve +/- equations within 100
E. Model and solve +/- equations across 10 using base-10 blocks
F. Solve +/- equations across 10 (Part 1)
H. Solve +/- equations within 100