Lesson 14 Ways to Represent Multiplication of Teen Numbers
Let’s make sense of some ways to represent the multiplication of teen numbers.
Warm-up Notice and Wonder: Seeing Groups
What do you notice? What do you wonder?
Activity 1 A Factor Greater than Ten
Tyler says he can use base-ten blocks to find the value of
Do you agree or disagree? Explain your reasoning.
Use Tyler’s method to find the value of
. Explain or show your reasoning.
Activity 2 Ways to Represent
Andre, Clare, and Diego represented the same expression. Their representations are shown below.
Where do you see the factors in each diagram?
Where do you see the product in each diagram?
What do the 60 and 24 in the diagram represent?
Explain how to use the diagram to calculate