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.
20+ Simple Hands On Activities That Help Build Fine Motor Skills
Simple Hands-On Activities That Help Build Fine Motor Skills - with fine motor skills going missing at preschool, try some of these hands-on invitations to help strengthen fine motor skills you clever monkey