Complete the addition equation for a sum of 9 or 10. A cube model is shown. Enter the missing term
A. Solve +/- equations within 9 based on a model of base-10 blocks
B. Complete addition equations to 9 based on a model of base-10 blocks
C. Record an equation based on a model of base-10 blocks (total of 9)
D. Complete addition equations to 10 based on a model of base-10 blocks
E. Solve +/- equations within 10 based on a model of base-10 blocks
F. Determine a missing addends in equations with a sum of 10