# Singapore Secondary 1 Number and Algebra sec1 numbers operations

integers, fractions, decimals, approximation, estimation; calculate, estimate, approximate.

System: Singapore MOE Primary Mathematics
Route: /math/standards/singapore-primary/curratom-singapore-moe-sec1-g3-number-and-algebra-numbers-and-operations-sec1-g3-work-primes-factors-multiples-integers
Skills: 3

## Skills and Examples

- [Factors Basic](/math/skills/oa/factors-basic) — Whole-Number Operations and Fact Fluency
- [Multiples Basic](/math/skills/oa/multiples-basic) — Whole-Number Operations and Fact Fluency
- [Prime Composite Basic](/math/skills/oa/prime-composite-basic) — Whole-Number Operations and Fact Fluency