Add 1 to numbers 1–9 to see the pattern of the next number using 5-group drawings and equations.

In this lesson, students explore patterns when adding one. First, they use a number path to find what happens when adding one to a number and write a number sentence to model it. Then they create a pictorial representation, using 5-group drawings, of what happens when adding one. Finally, students write number sentences to model the equations and they make a connection between both representations.