D. Sort items by shape and color to create addition models. Identify whether the sums are the same or different in two equations

A. Identify correct addition sentences to 8

B. Write addition sentences based on a model and see that different combinations of addends can result in the same sum

C. Select models that show the same sum and match a model to the correct equation

E. Observe models and write many addition equations with the same sum

F. Solve simple word problems with the help of a model and learn where to place the plus sign