How to Multiply, Invert & Solve with Matrices
Matrix multiplication, determinant, inverse and solving Ax=b explained with clear, worked examples.
How to Solve Linear & Quadratic Equations
Learn substitution, factoring, quadratic formula and elimination with step-by-step worked examples.
How to Calculate Days Between Dates & Add Days
Work out durations and add/subtract days, including business days. Date maths tips with examples.
How to Convert Units - Metric & Imperial Guide
Master unit conversions for length, mass, temperature and volume with worked examples and prefix tips.
How to Calculate Area - Formulas & Examples
Area formulas for circles, rectangles, triangles and more with step-by-step examples and unit guidance.
How to Calculate Volume - Shapes & Worked Steps
Compute volume for cylinders, spheres, prisms and tanks. Worked examples, units and conversion tips.
How to Use Significant Figures - Rules & Rounding
Count and round significant figures correctly. Apply rules in addition, subtraction, multiplication and division.
How to Convert Roman Numerals - Rules & Examples
Convert between Roman numerals and numbers. Learn subtractive notation rules with clear, worked examples.