Understanding Arrays and Repeated Addition

The video tutorial explains how to use arrays to model repeated addition. It covers the concept of equal rows and columns in arrays, using strawberries as an example. The tutorial demonstrates how to write equations using repeated addition for both rows and columns, and compares the resulting sums. By the end, viewers understand how to use arrays to find totals through repeated addition.

What is the main characteristic of an array in terms of rows?

• Rows contain only one object.

• Rows are always longer than columns.

• Each row has the same number of objects.

• Each row has a different number of objects.

Tags

CCSS.2.OA.C.4

How many strawberries are there in each column of the array?

• Three strawberries

• Two strawberries

• One strawberry

• Four strawberries

Tags

CCSS.2.OA.C.4

What is the equation for the total number of strawberries when counting by rows?

• 5 plus 5 equals 10

• 4 plus 4 equals 8

• 3 plus 3 equals 6

• 2 plus 2 equals 4

Tags

CCSS.2.OA.C.4

How do you find the total number of strawberries in the array using columns?

• Add 3 plus 3

• Add 2 plus 2 plus 2

• Add 4 plus 4

• Add 1 plus 1 plus 1

Tags

CCSS.2.OA.C.4

What is common between the two equations derived from the array?

• One equation is incorrect.

• They have the same sum.

• They have different sums.

• One equation is longer.

Tags

CCSS.2.OA.C.4