Four Operations
Big calculations are just lots of small ones done in the right order.
Long multiplicationLong divisionOrder of operationsFactors, multiples & primes
📖 Learn
Long multiplication
For 34 × 26: do 34 × 6 and 34 × 20, then add them.
Long division
Divide, multiply, subtract, bring down — repeat.
Primes
A prime has exactly two factors: 1 and itself. 2, 3, 5, 7, 11, 13…
Worked example
Work out 432 ÷ 12
- 112 into 43 goes 3 (36), remainder 7.
- 2Bring down 2 → 72.
- 312 into 72 goes 6. Answer 36 ✅
⭐ Practise
π
Ask Professor Pi
Type a question or say where you're stuck. You'll get hints, not just answers!
AI-powered tutor — it can make mistakes, so check with your teacher if unsure.