# Singapore P2 Number and Algebra add sub within 1000

addition, subtraction, within 1000; calculate, solve, explain.

System: Singapore MOE Primary Mathematics
Route: /math/standards/singapore-primary/curratom-singapore-moe-p2-number-and-algebra-addition-and-subtraction-p2-add-subtract-1000-mental-strategies-algorithms
Skills: 2

## Skills and Examples

- [Add Sub Within 1000 Algorithm](/math/skills/nbt/add-sub-within-1000-algorithm) — Whole-Number Operations and Fact Fluency
- [Add Sub Within 1000 Models](/math/skills/nbt/add-sub-within-1000-models) — Whole-Number Operations and Fact Fluency