Exploring Multiplication with Arrays

The video tutorial introduces the concept of using arrays to model multiplication and find factors. It explains the arrangement of objects in rows and columns, and how this can be used to solve multiplication problems. Through examples, such as planting tomato plants and arranging tiles, the tutorial demonstrates how to create different arrays and write multiplication sentences. The video concludes with a review of the key concepts, emphasizing the importance of understanding rows and columns in arrays.

What is an array in the context of multiplication?

• A set of objects arranged in a single line

• A set of objects arranged in rows and columns

• A set of objects arranged in a circle

• A set of objects arranged randomly

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CCSS.3.OA.A.1

In an array, which direction do columns go?

• Circular

• Up and down

• Diagonal

• Left to right

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CCSS.3.OA.A.1

Lee plants three rows of tomato plants with six plants in each row. How many plants are there in total?

• 21

• 12

• 15

• 18

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CCSS.2.OA.C.4

How many rows and columns are there in an array of eight tiles arranged in one row?

• 4 rows and 2 columns

• 2 rows and 4 columns

• 8 rows and 1 column

• 1 row and 8 columns

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CCSS.2.OA.C.4

What is the multiplication sentence for an array with 2 rows and 4 columns?

• 2 * 2 = 4

• 2 * 4 = 8

• 4 * 4 = 16

• 4 * 2 = 8

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CCSS.3.OA.A.1

How many different arrays can you make with eight tiles?

• 3

• 4

• 1

• 2

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CCSS.4.OA.B.4

What is the multiplication sentence for an array with 3 rows and 4 columns?

• 4 * 4 = 16

• 3 * 3 = 9

• 3 * 4 = 12

• 4 * 3 = 12

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CCSS.3.OA.A.1

How many rows and columns are there in an array with 4 rows and 5 columns?

• 5 rows and 5 columns

• 4 rows and 5 columns

• 5 rows and 4 columns

• 4 rows and 4 columns

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CCSS.3.OA.A.1

What is the multiplication sentence for an array with 6 rows and 3 columns?

• 3 * 6 = 18

• 3 * 3 = 9

• 6 * 3 = 18

• 6 * 2 = 12

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CCSS.3.OA.A.1

What is the most important thing to remember when using arrays to model multiplication?

• The number of objects

• The direction of rows and columns

• The size of the objects

• The color of the objects

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CCSS.3.OA.A.1