Number Ladder
Adding combines every member of two or more groups into one total; the groups change arrangement, but no members disappear.
MathsAges 6-11~9 min🎙️ Voice tutor
Play freeNo account needed
What your child will figure out
- Predict a total before physically combining two visible groups.
- Combine and count every member to explain why an addition total includes all groups.
- Transfer adding-as-combining to three groups and a new summit context.
- Solve generated arithmetic while an adaptive difficulty dial responds to accuracy, speed, and hints.
The levels
- Firefly meeting
Predict 2 + 3, combine the two visible groups, observe five, and explain that every firefly remains.
- Pack the picnic
Combine 4 and 2 objects in a new context and use all six objects as evidence.
- Three trails meet
Extend combining from two groups to three groups and observe that all addends contribute.
- Summit transfer
Transfer adding-as-combining to climbers arriving at a summit, then explain the unchanged relationship.
Ready when they are.
Play Number Ladder free — no account, no card.
Play Number Ladder free