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
© Jo Edkins 2006 -
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