Exploring Repeated Addition with Arrays

The video tutorial introduces arrays, explaining how they consist of rows and columns. It emphasizes the importance of having equal numbers of objects in each row to form an array. The tutorial demonstrates using repeated addition to find the total number of objects in arrays, providing practical examples with cupcakes, cookies, and chocolates. It encourages students to use various strategies for addition and prepares them for future multiplication concepts. The lesson concludes with a challenge problem to reinforce learning.

What defines an array?

• A single row of items

• Items arranged in rows and columns with the same number of items in each row

• Items arranged in rows and columns with varying numbers

• A collection of items in random order

Tags

CCSS.3.OA.A.1

What will happen if a row in an array has a different number of items compared to other rows?

• It's still considered an array

• It becomes a list instead of an array

• The array becomes a matrix

• It's no longer an array

Tags

CCSS.2.OA.C.4

How can you quickly determine the total number of items in an array?

• Multiplying the number of rows by the number of columns

• By counting each item individually

• Using repeated addition

• Guessing based on the array's size

Tags

CCSS.3.OA.A.1

What is the total number of cookies if you have 3 rows of 3 cookies each?

• 15

• 12

• 9

• 6

Tags

CCSS.2.OA.C.4

Why is repeated addition useful when working with arrays?

• It simplifies the calculation process for larger arrays

• It's the only way to find the total number of items

• It requires less understanding of math

• It's faster than multiplication

Tags

CCSS.3.OA.A.1

In third grade, what mathematical operation can students start using to solve problems involving arrays?

• Subtraction

• Division

• Multiplication

• Addition

Tags

CCSS.3.OA.A.1

If an array has 4 rows of 6 chocolates each, how many chocolates are there in total?

• 10

• 20

• 24

• 30

Tags

CCSS.2.OA.C.4

What repeated addition equation represents an array of 3 rows with 4 windows each?

• 3 + 4 + 3

• 4 + 4 + 4

• 3 + 3 + 3

• 4 + 4 + 4 + 4

Tags

CCSS.2.OA.C.4

How many total objects are in an array with 2 rows of 6 items each?

• 12

• 8

• 14

• 10

Tags

CCSS.2.OA.C.4

What is the total number of bears in an array with 5 rows and 7 columns?

• 25

• 35

• 45

• 55

Tags

CCSS.2.OA.C.4