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Unit 8 - Lesson 7 - Grade 2: Illustrative Mathematics

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Grade 2 Unit 8
Lesson 7: What is an Array?
CC BY 2021 Illustrative Mathematics
Grade 2 Unit 8
Lesson 7: What is an Array?
CC BY 2021 Illustrative Mathematics
Lesson: What is an Array?

Which One Doesn't Belong: Counter Collections (Warm Up)

Which one doesn’t belong?

What is an Array?

Arrange each set of counters into equal rows with no extra counters.

How many counters are there in all? _______

Show how you arranged them using words, drawings, or numbers.
Arrange each set of counters into equal rows with no extra counters.

How many counters are there in all? _______

Show how you arranged them using words, drawings, or numbers.
Arrange each set of counters into equal rows with no extra counters.

How many counters are there in all?_______

Show how you arranged them using words, drawings, or numbers.

Rows of Counters

How many rows are in this array?

How many counters are in each row?

How many counters are there in all?

How many rows are in this array?

How many counters are in each row?

How many counters are there in all?

Use 6 counters to make 2 rows with the same number in each row. How many counters are in each row?

Use 20 counters to make 4 rows with the same number in each row. How many counters are in each row?

Cool Down: Count the Counters

How many rows are in this array?

How many counters are in each row?

How many counters are there in all?