Using visuals, students count and add objects. Then, the objects switch places to show that the sum is the same. Next, students solve addition problems using numbers only and notice that changing the order of the addends doesn't change the sum
B. Explore expressions and reinforce the commutative property of addition
C. Make equal expressions and solve equations with the same addends in a different order
D. Identify and create equal and non equal addition expressions
E. Use the equal sign to show and create equal expressions (Part 1)
F. Use the equal sign to show and create equal expressions (Part 2)
G. Identify whether number sentences are true and false