Unit 3, Lesson 4# Writing Products as Sums and Sums as Products (Continued)

EngageNY 45 min(s)

Students use an area model to write products as sums and sums as products. Students use the fact that the opposite of a number is the same as multiplying by -1 to write the opposite of a sum in standard form. Students recognize that rewriting an expression in a different form can shed light on the problem and how the quantities in it are related. Give students two minutes to write equivalent expressions using the distributive property for the first four problems.