Unit 6, Lesson 6# Decompose arrays into rows and columns, and relate to repeated addition

EngageNY 60 min(s)

In this lesson, students decompose one array by both rows and columns, seeing that when another row or column is added or removed, so is another group or unit. After identifying the number in each row, or group, students realize that they can write a repeated addition sentence to find the total number of objects in the array: 3 + 3 + 3 + 3 = 12.