Numbers - site map

Main index    Comparison between number systems Information for teachers Site map Alphabetical index Egyptian    Introduction - count and how they work Addition Multiplication Fractions Babylonian    Count with Babylonian numbers How Babylonian numbers worked Positional number system Lack of zero Base 60 in modern times Chinese    Standard numbers - count and how they work Financial numbers - count and how they work Rod numbers - count and how they work Greek    Count with Greek numbers How Greek numbers worked Giving words numerical values Modern use of Greek letters to mean numbers Roman    Count with Roman numbers How Roman numbers worked How to remember the symbols Roman numbers greater than 4000 Modern use of Roman numbers Mayan    Count with Mayan numbers How Mayan numbers worked Binary    Introduction to binary - how does binary work? Adding in binary Multiplying in binary Binary counter - using people Binary card game - computer plays Binary card game - how the game works Binary card game - you play Other bases    Count with numbers in bases other than ten How numbers in other bases work Number convertor Arabic Numbers    Arabic Numbers introduction    Count with Arabic numbers How to write Arabic digits How Arabic numbers work Visualise a million Add    Addition tables Commutative and associative Pairs that add to ten Adding larger numbers Adding with carry Practise adding Adding decimals Adding using calculation machines Subtract    Subtraction tables Subtracting larger numbers Subtracting with borrow (method 1) Subtracting with carry (method 2) Subtracting with carry (method 3) Practise subtracting Subtracting using calculation machines Multiply    Multiplication tables Patterns to help learning tables Commutative, associative and distributive Order of calculation Multiplication on paper Practise multiplication Long multiplication Multiplication using fingers Multiplication using calculating machines Divide    Division on paper Practise division Long division Factors Practise factors Division using calculating machines Practise sums    English version La version francaise Less than 1    Fractions Compare fractions Reducing fractions Arithmetic with fractions Decimals Rounding decimals Multiply / divide decimals by ten Significant figures of decimals Decimal point Percentages Comparison of fractions, decimals and percentages Types of numbers    Natural numbers Cardinals and Ordinals Integers Rationals Irrationals Reals Imaginary numbers Complex numbers Finger systems    Signing numbers with hands Days in months Chisenbop counting Multiplying    Multiply by nine Multiply by six, seven, eight or nine Count up to 100,000 on one hand Calculating machines    Abacus    Enter number to see it on an abacus Using a simple abacus Interactive simple abacus Interactive eastern abacus Napier's bones    Napier's bones How to use Napier's bones Interactive Napier's bones Using Napier's bones for long multiplication and division Slide Rule Logarithms Electronic calculator    Simple calculator How to use a calculator Arithmetic calculator Calculators on computers Stand alone simple abacus Stand alone eastern abacus Stand alone Napier's bones Stand alone slide rule Stand alone simple calculator Stand alone arithmetic calculator Words for numbers    Introduction    English words for numbers Special words for numbers Big number words Alphabetical order of number words Number words in French and German Popular songs based on numbers    Once I caught a fish alive Ten green bottles One man went to mow One potato A partridge in a pear tree Green grow the rushes, O Counting sheep Interesting numbers    0 - zero    Properties of zero History of zero 1 - one    Properties of one "As sure as one and one is two" Boolean logic i - imaginary and complex numbers    What is i? What is √i? The complex plane Mandelbrot Set √2 - square root of two    Proof that √2 is not rational Visualise √2 Value of √2 Where roots are found - golden ratio and Fibonacci numbers    What are Fibonacci numbers? Natural occurrence of Fibonacci numbers Draw a spiral What is the Golden ratio? Golden rectangle e - base of natural logarithms    What is e? Value of e Logarithms Formula using e - pi    What is ? Calculate History of Various formulae using Googol and Googolplex - infinity    What is infinity? Countable sets Types of infinity Number of primes Handling data    Gathering data Make your own pictogram graph    How to use pictogram graph page Mean, median, mode     Minimum and maximum Median Mode Mean Confusion! Box-and-whisker plot Sorting data    Insertion sort Tree sort Quicksort

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