PSLE Math Formula Sheet (2026)
The definitive reference for PSLE preparation. Covers DST, Circles, and Percentage rules with pedagogical clarity.
This PSLE Math Formula Sheet is a concise, educator-curated reference designed for Primary 6 students preparing for the 2026 PSLE examination. It covers every essential formula across Numbers & Operations, Percentage, Ratio, Speed (DST), Circles, and Geometry — the six pillars of PSLE Paper 1 and Paper 2. Print it, pin it to the study desk, and use it for daily quick-recall drills.
Numbers & Operations
- • Order of Operations: (1) Brackets, (2) Multiply/Divide, (3) Add/Subtract
- • Rounding Rule: 0-4 round down, 5-9 round up
- • Fraction of Remainder: 'Spent 1/3 of remainder' = 1/3 × (Total - Spent)
- • HCF & LCM: Use the 'L-shape' division method for speed
Percentage
- • Find Percentage: (Part / Whole) × 100%
- • Percentage Change: (Change / Original) × 100%
- • GST (9%): Total = Original × 1.09
- • Discount: Selling Price = Marked Price × (100% - % Discount)
Ratio & Proportions
- • Unitary Method: Identify what '1 unit' represents first
- • Constant Total: Used when items are transferred between parties
- • Constant Difference: Used for age problems (gap never changes)
- • Simplifying: Divide all parts by the same Highest Common Factor
Speed (The DST Triangle)
- • Distance = Speed × Time
- • Speed = Distance ÷ Time
- • Time = Distance ÷ Speed
- • Average Speed = Total Distance ÷ Total Time (Never average the speeds!)
- • Conversion: 1 km/h = 5/18 m/s
Geometry - Circles
- • Diameter (d) = 2 × Radius (r)
- • Circumference = πd or 2πr
- • Area of Circle = πr²
- • Perimeter of Semicircle = πr + d (Including the straight edge)
- • Area of Quarter Circle = ¼πr²
Geometry - Shapes & Solids
- • Sum of angles in Triangle = 180°
- • Sum of angles in Quadrilateral = 360°
- • Area of Triangle = ½ × Base × perpendicular Height
- • Volume of Cuboid = Length × Breadth × Height
- • Surface Area = Sum of areas of all 6 faces
Frequently Asked Questions
How many formulas are in this PSLE math formula sheet?▾
This sheet covers 35 core formulas across 6 topic areas: Numbers & Operations, Percentage, Ratio & Proportions, Speed (DST), Circles, and Geometry & Solids. These are the formulas that appear most frequently in PSLE Paper 1 and Paper 2.
Is this aligned to the MOE 2026 syllabus?▾
Yes. Every formula is mapped to the MOE 2026 Primary Mathematics syllabus. We update the sheet annually to reflect any syllabus changes.
How should my child use this formula sheet?▾
We recommend printing it and placing it on your child's study desk. Use it as a quick-recall reference during revision — cover the formula, try to recall it, then check. Once your child can recall all 35 formulas without looking, they are exam-ready for the calculation components.
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