Curriculum · Foundations · Arithmetic & Number Sense
Arithmetic as Structure
Computation reorganized around structure: regrouping, factoring, distributivity.
Objectives
- Compute by restructuring, not grinding
- Exploit the distributive law
- Recognize friendly numbers
The full interactive edition of this lesson ships in v1.5. The topic is live everywhere else — the problems below feed your Arithmetic & Number Sense mastery now.
Train the topic