Compilation of calculation rules for fractions with examples. Example calculator for determining the least common multiple (LCM) and the greatest common divisor (GCD).

Fraction Arithmetic Reducing Addition Subtraction Multiplication Division Power Roots Number Systems


Fraction Calculator Mean Value Calculator


Description of the combinatoric tasks and the basic functions. With help of examples and calculators is the using of combinatoric issues illustrated.

Combinatorics Faculty Binomial coefficient Polynomial coefficient Permutations Variations Combinations


Binomial Mean Value Calculator Fraction Calculator

Complex Numbers

Calculation rules and definitions for complex numbers. Addition, multiplication and division of complex numbers. Powers and relations of complex conjugate numbers. Trigonometric and exponential representation of complex numbers. Example computer.

Calculation rules


Complex Numbers


Complex numbers Addition complex numbers Multiplication complex numbers Division complex numbers Power complex numbers

Curve fit

The regression analysis is used for determining or estimating model parameters. Determining a best-fit line using the least squares method with example computer.

Regression Linear fit Power function Fourier series


Curve fit


Interest, percentage and per mille calculation.

Percentage calculation Per mille calculation Interest calculation Rule of three calculation


Percentage calculator


Basic Functions

Elementary mathematical functions graphically with computer for characteristic values ​​of the function. Description of the following elemental functions with graphic display and computer example: linear function, quadratic function, sine function, exponential function, error function and normal distribution.

Basic Functions Linear Functions Quadratic Functions Sin function (sin) Exponential Function (exp) Error Function exp(-x2) Normal Distribution

Grafical plot

Function Plot Parabola Plotter Cubic Plotter Normal Distribution Plot Damped Vibration Plot

Complex Functions

Complex Functions: Linear and quadratic functions, trigonometric and exponential functions plotted with domain colouring method.

Complex Functions

Linear Equations

Linear equations with one and two unknowns, calculator and graphical presentation.

Linear Equations

Linear Equation Systems

General representation. Solving methods: Addition method, Gauss method,... calculator and graphical presentation.

Linear Equation Systems


Systems 2x2 Systems 3x3 NxN Cramer's rule NxN Gauss method

Quadratic Equations

General representation. pq-Formula. Examples with calculation steps. Calculator with calculation steps.

Quadratic Equations


Quadratic Equation Normal form to vertex form

Differential equations

Linear differential equation first order and first order models.

Differential equations Exponential growth Logistic growth

Online ODE Calculator

ODE first order General first order ODE General second order ODE ODE second order ODE-System 2x2 ODE-System 3x3 Collection 1. order y'+ay=b y'+ay=ce^bx y'+2xy=xe^(-x^2) y'+xy=x y'+y=x y'=y^2 y'+y^2=1 y'=(Ay-a)(By-b)

Derivative / Calculus


Explanation of the derivation rules with examples and calculation method: factor rule, sum rule, product rule, quotient rule, chain rule.

Derivation rules Derivative calculator Gradient calculator Gradient 2d Plot


Explanation of the integration rules for definite and indefinite integrals with examples and calculation method.

Integration Rules

Matrix / Determinants

Matrix, Determinant and Vector

Matrix addition, subtraction, multiplication each with calculator and calculation method. Rules for computing determinants explained with examples. Calculator with calculation method. Leibniz formula. Vector addition, subtraction, multiplication each with calculator and calculation method.

Matrix rules Determinant rules Vector calculation Vector scalar Vector addition Vector subtraction Inner product Cross product Length Matrix Eigenvalues


Vector addition Vector subtraction Matrix-Vector product Inner product


Sum and dif of MxN matrices Multiplication of matrices Matrix-Vector Multiplication Adjugate matrix QR decomposition Inverse Matrix Determinant 2x2 Determinant 3x3 Determinant 3x3 symbolic Determinant 4x4 Determinant 4x4 symbolic Determinant 5x5 Determinant NxN



Calculations on rectangular and the general triangle. Sine and cosine rule application.

Trigonometry Angle, opposite cathetus Angle, adjacent cathetus Cathetus Cathetus, hypotenuse 2 sides, 1 angle 2 angles, 1 side 3 sides Tower height Cross bearing Triangle of forces Hansens task Trigonometric function tables Power and n-th argument


Triangle Circle Ellipse Trapeze Parallelogram Rectangle

Body Mass Indices

In order to determine whether a body model deviates from the norm or also involves a health risk, various indices have been developed. These indices can indicate whether there is an overweight or underweight or a health risk.

Calculation of the Body Indices Calculator for the Body Indices BSI Calculator BMI Calculator AMI Calculator Broca Calculator Ponderal Calculator Body fat and FFMI WHtR Calculator WHR Calculator


Numeric algorithms.

Newton Method

Basic calculators

Logaritm Sine, Cosine, Tangent Roots: square, cubic, ...


Complex functions DNA Recurrence plot



Using MathML to mathematical expressions on web pages can be displayed. On the following pages the MathML code is on examples explained.

MathML Examples Integral Sum Brackets Indices Fracture Roots Tables Matrix Determinant Vector Indentation Style Operators Differential / Integral Points Geometric Set Logic Vector Greek Letter


JSXGraph is a web-browser library for interactive geometry, function plotting, charting and data visualization in a Web browser. The library is completely implemented in JavaScript and uses SVG, VML, or canvas.

JSXGraph is developed at the Department of Mathematics and Didactics at the University of Bayreuth.

JSXGraph University Bayreuth JSXGraph Example: ODE with direction field