Given an addition expression, students determine the sum. Then they solve addition equations
A. Count two addends and determine the total
B. Determine total number of objects and determine its two addends
C. Use the + and = signs in an equation
D. Identify addends and sum in an equation
E. Compose an addition equation based on a picture
F. Represent objects with cubes
G. Compose addition equations based on cubes, and solve equations with and without cubes