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Unit 1, Section C

Represent Multiplication with Arrays and the Commutative Property

Grade 3

Practice

Problem 1
ForLesson 16: Arrange Objects into Arrays
Student Task Statement
Explain or show 2 different ways that you see equal groups in the array.

Rearrange the dots to make a different array.
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Problem 2
ForLesson 17: Match and Draw Arrays
Student Task Statement

Rearrange the circles to make an array in 2 different ways.

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Problem 3
ForLesson 18: Represent Arrays with Expressions
Student Task Statement
There are 4 rows of water bottles in the box. There are 5 bottles in each row.

Draw an array to represent the situation.

Write a multiplication expression to represent the number of bottles.
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Problem 4
ForLesson 19: Solve Problems Involving Arrays
Student Task Statement
There are 5 rows of chairs in the room. There are 4 chairs in each row. How many chairs are in the room?

Write a multiplication equation to represent the situation.
Use a symbol for the unknown.

Find the value that makes your equation true.
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Problem 5
ForLesson 20: The Commutative Property
Student Task Statement
Write a multiplication equation that represents each array.

A

B

How are the arrays alike? How are they different?
Problem 6
Exploration
Student Task Statement

Andre says that there are an odd number of circles in this picture.

Do you agree with Andre? Explain or show your reasoning.

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Problem 7
Exploration
Student Task Statement
Find a collection of objects in the classroom or at home that is arranged in an array.

Describe the objects.

Create a drawing of the objects.

Write an equation showing how many objects there are.
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