Unit 1, Lesson 20
The Commutative Property
Grade 3
Activity 1
What do you notice? What do you wonder?
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Write a description of a situation for each array.
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How are the situations alike? How are they different?
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Write a multiplication equation for each situation.
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How does your equation connect to the situation and array?
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Activity 2
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Write 2 multiplication equations that represent the array.
- Explain why both equations can represent the array.
Student Section Summary
We learned how equal groups are related to arrays and how to represent arrays with multiplication expressions and equations.
Equal groups:
Array:
Expression:
Equation:
We also learned that we can multiply numbers in any order and get the same product.