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Unit 4 - Lesson 14 - Grade 3: Illustrative Mathematics
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Instructions
Lesson: Ways to Represent Multiplication of Teen Numbers
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Cool Down: Multiply and Explain
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Grade 3 Unit 4
Lesson 14: Ways to Represent Multiplication of Teen Numbers
CC BY 2021 Illustrative Mathematics®
Grade 3 Unit 4
Lesson 14: Ways to Represent Multiplication of Teen Numbers
CC BY 2021 Illustrative Mathematics®
Notice and Wonder: Seeing Groups (Warm Up)
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Question 1
1.
What do you notice?
1
Question 2
2.
What do you wonder?
A Factor Greater than Ten
Question 3
3.
Tyler says he can use base-ten blocks to find the value of 7 x 13 because he knows 7 x 10 and 7 x 3. He says this diagram proves his thinking.
Do you agree or disagree? Explain your reasoning.
Question 4
4.
Use Tyler’s method to find the value of 3 x 14. Explain or show your reasoning.
visibility
View drawing
Ways to Represent
Andre, Clare, and Diego represented the same expression. Their representations are shown below.
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Question 5
5.
Where do you see the factors in each diagram?
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Question 6
6.
Where do you see the product in each diagram?
Question 7
7.
Find the value of 5 x 15 and explain how it’s represented in the diagram.