In previous lessons, students learned that whole numbers can be represented by tick marks and points on the number line. They learned that numbers farther to the right on a number line are greater than those to the left.

In this lesson, students build on that understanding to connect representations that use an arrow to show moving from one number to another on the number line (“jumps”) to the operations of addition and subtraction. Students match equations and number line representations and explain how they know they match (MP2, MP7).

How did students’ work with locating and labeling numbers on number lines prepare them to connect the direction of arrows to addition and subtraction on a number line? What can you do in the next lesson to build on this understanding?