Exploring Arrays and Repeated Addition

This video tutorial introduces second graders to the concepts of arrays and repeated addition, laying the groundwork for understanding multiplication. It explains arrays as objects arranged in rows and columns, using examples like cupcakes, stars, and hearts. The video demonstrates how to write repeated addition problems by adding objects in rows or columns. Students are encouraged to practice with given examples and create their own arrays to reinforce learning.

What is the purpose of learning about arrays and repeated addition?

• To learn about fractions

• To improve reading skills

• To understand the basics of multiplication

• To prepare for learning division

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CCSS.4.NBT.B.5

What direction do columns in an array extend?

• In circles

• Horizontally

• Vertically

• Diagonally

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CCSS.3.OA.A.1

What is an array?

• A single row of objects

• A collection of objects placed in rows and columns

• A type of mathematical operation

• A drawing of shapes

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CCSS.3.OA.A.1

What does a row in an array represent?

• A circular arrangement of objects

• A diagonal line of objects

• A vertical line of objects

• A horizontal line of objects

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CCSS.3.OA.A.1

How many cupcakes are there in total if there are 4 cupcakes in each of the 3 rows?

• 7

• 12

• 9

• 15

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CCSS.2.OA.C.4

How can you write a repeated addition problem for an array?

• By multiplying the number of rows by the number of columns

• By dividing the rows and columns

• By subtracting the objects

• By adding the number of objects in each column

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CCSS.2.OA.C.4

If an array has 3 stars in each column and 5 stars in each row, how many stars are there in total?

• 18

• 15

• 8

• 10

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CCSS.2.OA.C.4

In the example with hearts, how many hearts are there in each column?

• 2

• 3

• 5

• 4

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CCSS.1.NBT.A.1

What is the total number of hearts in the array if there are 2 hearts in each row and 4 columns?

• 12

• 6

• 8

• 10

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CCSS.2.OA.C.4

When creating your own array, what is essential to remember?

• The number of objects must be odd

• The arrangement of objects into rows and columns

• The size of the objects

• The color of the objects

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CCSS.3.OA.A.1