Math Calculators

Percentage difference, change and error side by side — because they are three different answers.

Simplify a ratio to lowest terms and split a total by it — two terms or three.

Solve a/b = c/d for any missing term, with both cross products shown.

Sample or population — the switch that changes the answer, made the first control.

Mean, median and mode together — because all three are called the average.

Greatest common factor, with the prime factorisation of every number shown.

Least common multiple, showing where the multiples of each number meet.

Two points in, the whole line out — slope, equation, intercepts, distance and midpoint.

Roots, discriminant and vertex — including the complex roots most calculators refuse.

The decimal, and the simplified radical form a phone will not give you.

Quotient, remainder and the written working, one digit at a time.