Array Introduction & Practice

What is a rectangular array?

• Unequal groups of objects

• A group of objects arranged in equal groups and columns.

• A tape diagram

• Objects in circles

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CCSS.2.OA.C.4

What direction does a column go?

• Up and down

• Left to right

What direction does a row go?

• Up and down

• Left to right

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CCSS.2.G.A.2

How many rows are in this array?

• 3 rows of 4

• 4 rows of 3

• 12 apples

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CCSS.2.G.A.2

CCSS.2.OA.C.4

How many columns are in this array?

• 3 rows of 4

• 4 columns of 3

• 12 trucks

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CCSS.2.G.A.2

CCSS.2.OA.C.4

If we put these equal groups into an array as rows, how many rows would we make?

• 3 rows

• 2 rows

• 6 rows

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CCSS.2.OA.C.4

If we put these equal groups into an array as columns, how many columns would we make?

• 4 columns

• 5 columns

• 20 columns

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CCSS.2.G.A.2

CCSS.2.OA.C.4

Look at the array. How many rows of 3 do you see?

• 3 rows of 5

• 4 rows of 3

• 5 rows of 3

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CCSS.2.G.A.2

CCSS.2.OA.C.4

How many columns of 4 do you see in this array?

• 4 rows of 4

• 4 columns of 4

• 16 dots

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CCSS.2.G.A.2

CCSS.2.OA.C.4

How many rows and columns do you see in this array?

• 2 rows and 4 columns

• 4 rows and 2 columns

• 8 rows and 2 columns

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CCSS.2.G.A.2

CCSS.2.OA.C.4