Arithmetic & algebra 11
PercentageA percentage of a number, what percentage one number is of another, and percentage increase.
ExponentRaise any number to any power, including fractional and negative exponents.
Square RootSquare, cube and nth roots, given exactly where the result is exact.
LogarithmLog to any base, natural log, and the antilog going the other way.
Scientific NotationConvert between standard form and ordinary decimal notation.
Significant FiguresRound to a set number of significant figures, and count the ones you already have.
Fraction to DecimalFractions to decimals and back, with recurring digits marked.
ProportionSolve for the missing term when two ratios are set equal.
Polynomial Long DivisionDivide one polynomial by another with every step of the working shown.
GCF/LCMGreatest common factor and least common multiple of 2 to 4 numbers.
Quadratic EquationRoots of ax² + bx + c = 0, including complex roots when the discriminant is negative.
Geometry & lines 2
Statistics 6
The ones people reach for most. Each accepts a pasted list of values rather than one figure at a time.
Standard DeviationPopulation and sample deviation, variance and mean from a data set.
Confidence IntervalMargin of error and interval bounds for a sample mean at your chosen level.
P-ValueTurn a test statistic into a p-value for z, t, chi-square or F tests.
Test GradeMarks out of a total into a percentage and the matching letter grade.
AverageMean, median, mode and range from a pasted list of numbers.
Sample SizeMinimum sample size for a given confidence level and margin of error.