I think you could also have multiple pipe cleaners coming from one number and students have to show multiple ways to add numbers to get to that number. Counting with pipe cleaners and beads. Great for fine motor development too.
Create a number line 1 to 20 with this fun hands-on activity. This activity can be adapted to fill in the missing numbers on the number line. Great for counting, early math, math activity for preschool, prek, and kindergarten age children