# Numbers - alphabetical index

A - B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U - V - W - X - Y - Z

## A

abacus
abacus number counter
abacus - enter number to see it on an abacus
abacus - interactive eastern abacus
abacus - interactive simple abacus
abacus - using a simple abacus
abacus system - comparison between number systems
abacus system - Chinese rod numbers
alpha - Greek number symbol for one
alphabetical order of number words
Arab use of numbers
Arabic numbers
Arabic number counter
Arabic number symbols
Arabic numbers - decimals
Arabic numbers - division
Arabic numbers - fractions
Arabic numbers - how they work
Arabic numbers - less than 1
Arabic numbers - multiplication
Arabic numbers - positional
Arabic numbers - subtraction
Arabic numbers - types of numbers
Arabic numbers - zero
arithmetic with fractions
arithmetic calculator
arithmetic mean
"as sure as one and one is two"
associative - not division
associative - multiplication
associative - not subtraction
average

## B

Babylonian numbers
Babylonian number counter
Babylonian number symbols
Babylonian numbers - how they worked
Babylonian numbers - unary & positional
Babylonian numbers - zero
baker's dozen
base - comparison between number systems
base 2 - binary numbers
base 5/10 - Roman numbers
base 5/10/100 - Chinese rod numbers
base 5/20 - Mayan numbers
base 10 - Arabic numbers
base 10 - Chinese financial numbers
base 10 - Chinese standard numbers
base 10 - Egyptian numbers
base 10 - Greek numbers
base 10/60 - Babylonian numbers
base 60 - modern
bases - other
bases other than ten
bases other than ten number counter
bases other than ten number symbols
bases other than ten - how they work
bases other than ten - positional
bases other than ten - zero
beta - Greek number symbol for two
big number words
binary in Egyptian multiplication
binary numbers
binary number counter
binary number symbols
binary numbers - card game - computer plays
binary numbers - card game - how the game works
binary numbers - card game - you play
binary numbers - how they work
binary numbers - multiplying
binary numbers - positional
binary numbers - zero
BODMAS - order of calculation
Boolean logic
borrow - subtraction
box and whisker plot
brace

## C

C - Roman number symbol for hundred
calculate e
calculate golden ratio
calculate natural log
calculate pi
calculate root 2
calculating machines
calculating machines - abacus
calculating machines - Napier's bones
calculating machines - slide rule
calculating machines - logarithms
calculating machines - calculator
calculating numerical values of words - Greek
calculation order
calculator
calculator - arithmetic calculator
calculator - calculators on computers
calculator - how to use a calculator
calculator - simple calculator
card game demonstrating binary
cardinals - types of numbers
carry - division
carry - multiplication
carry - subtraction
chi - Greek number symbol for six hundred
Chinese financial numbers
Chinese financial number counter
Chinese financial number symbols
Chinese financial numbers - how they work
Chinese financial numbers - word system
Chinese financial numbers - zero
Chinese rod numbers
Chinese rod number counter
Chinese rod number symbols
Chinese rod numbers - abacus
Chinese rod numbers - how they work
Chinese rod numbers - positional
Chinese rod numbers - no zero
Chinese standard numbers
Chinese standard number symbols
Chinese standard number counter
Chinese standard numbers - how they work
Chinese standard numbers - word system
Chinese standard numbers - zero
Chisenbop counting
Chisenbop number counter
Christmas song
circle's circumference - pi
clay - Babylonian numbers
clocks using Roman numbers
coil of rope - Egyptian number symbol
comma used as decimal point
commutative - not division
commutative - multiplication
commutative - not subtraction
comparison number systems
compare fractions
compare fractions, decimals and percentages
complex numbers - i
complex numbers - types of numbers
complex plane
computer calculators
compound interest calculator
confusion between mode, median and mean
convert English to Greek letters
count up to 100,000 on one hand
countable infinite sets
counting sheep
couple

## D

D - Roman number symbol for five hundred
data handling
data - gathering data
data - make your own pictogram graph
data - using pictogram graph page
data - sorting
data - median, mode, mean
days in months
Deaf signing numbers
debt calculator
decimal - Arabic numbers (base 10)
decimal fractions
decimals
decimals - compare with fractions and percentages
decimals - decimal point
decimals - multiply / divide by ten
decimals - rounding
decimals - significant figures
delta - Greek number symbol for four
denominator of fraction
different ways of writing Arabic digits
diameter - pi
digamma - Greek number symbol for six
divide decimals by ten
division - Arabic numbers
division - not associative
division - not commutative
division - on paper
division - partly distributive over addition and subtraction
division - practise
division - factors
division - practise factors
division - using calculating machines
division - types of numbers
distributive - multiplication over addition and subtraction
distributive - division partly over addition and subtraction
dot - Mayan number symbol for one
double base - comparison between number systems
dozen
draw a spiral using Fibonacci numbers

## E

e - base of natural logarithms
e - what is it?
e - value
e - logarithms
e - formula
eastern abacus
Egyptian numbers
Egyptian number counter
Egyptian number symbols
Egyptian numbers - how they worked
Egyptian numbers - fractions
Egyptian numbers - fractions - Horus' eye
Egyptian numbers - infinity
Egyptian numbers - multiplication
Egyptian numbers - no zero
Egyptian numbers - unary
English words for numbers
epsilon - Greek number symbol for five
eta - Greek number symbol for eight
European use of numbers
exponent - logarithms
exponent - types of numbers
eye of Horus in Egyptian fractions

## F

factors
Fibonacci introduced Arabic numbers in Europe
Fibonacci numbers and golden ratio
Fibonacci numbers - what are they?
Fibonacci numbers - natural occurrence
Fibonacci numbers - draw a spiral
financial Chinese numbers
finger - Egyptian number symbol
finger systems
finger systems - signing numbers with hands
finger systems - days in months
finger systems - chisenbop counting
finger systems - multiplying
finger systems - multiply by nine
finger systems - multiply by six, seven, eight or nine
finger systems - count up to 100,000 on one hand
finger techniques to help with multiplication
formula using e
formula using i
formulae using pi
formula using root 2
fractions
fractions - arithmetic
fractions - compare
fractions - compare with decimals and percentages
fractions - reducing
fractions in Egyptian numbers
French version - practise mental arithmetic
French words for numbers

## G

gamma - Greek number symbol for three
gathering data
geometric mean
German words for numbers
giving words numerical values - Greek
golden ratio - What is it?
golden ratio - golden rectangle
googol and googolplex
graph - pictogram
great gross
Greek numbers
Greek number counter
Greek number symbols
Greek numbers - how they work
Greek numbers - letter system
Greek numbers - modern use
Greek numbers - no zero
Greek numbers - words having numerical values
green bottles song
green grow the rushes, O
gross

## H

handling data
hands - way to remember Roman numbers
help learning tables
Hindu-Arabic numbers, otherwise known as Arabic numbers
history of Arabic numbers
history of Babylonian numbers
history of Binary numbers
history of Chinese numbers
history of Egyptian numbers
history of golden ratio
history of googol and googolplex
history of Greek numbers
history of Mayan numbers
history of pi
history of Roman numbers
history of root 2
history of zero
how Arabic numbers work
how Babylonian numbers worked
how bases other than ten work
how binary numbers work
how Chinese financial numbers work
how Chinese standard numbers work
how Chinese rod numbers work
how Chisenbop counting works
how Egyptian numbers worked
how Greek numbers work
how Mayan numbers worked
how Roman numbers worked
how tallies work
how to remember Roman number symbols
how to use a calculator
how to use Napier's bones
how to write Arabic digits
Heh - Egyptian number symbol
Horus's eye in Egyptian fractions

## I

I - Roman number symbol for one
i - imaginary and complex numbers
i - Mandelbrot set
i - the complex plane
i - what is i?
i - what is square root of i?
imaginary numbers - i
imaginary numbers - types of numbers
improper fractions
infinity
infinity - countable sets
infinity - number of primes
infinity - types of infinity
infinity - types of numbers
infinity in Egyptian numbers
information for teachers
iota - Greek number symbol for ten
insertion sort
integers - types of numbers
interactive eastern abacus
interactive Napier's bones
interactive simple abacus
interesting numbers
interesting numbers - e - base of natural logarithms
interesting numbers - golden ratio and Fibonacci numbers
interesting numbers - googol and googolplex
interesting numbers - imaginary and complex numbers
interesting numbers - infinity
interesting numbers - one
interesting numbers - pi
interesting numbers - square root of two
interesting numbers - zero
irrationals - infinity
irrationals - types of numbers

## K

kappa - Greek number symbol for twenty
keraia - Greek symbol to show number
koppa - Greek number symbol for ninety

## L

L - Roman number symbol for fifty
lambda - Greek number symbol for thirty
large number hand counter
large number words
large Roman numbers
larger numbers - division larger numbers - multiplication
larger numbers - subtraction
learning tables
less than 1
letter system - comparison between number systems
letter system - Greek numbers
line - Mayan number symbol for five
logarithms - calculating machines
logarithms using e
long division
long division - using Napier's bones
long multiplication
long multiplication - using Napier's bones
lotus - Egyptian number symbol

## M

M - Roman number symbol for thousand
Mandelbrot set
Mayan numbers
Mayan number counter
Mayan number symbols
Mayan numbers - how they work
Mayan numbers - unary & positional
Mayan numbers - zero
mean
median
minimum
maximum
mode
mental arithmetic
million - visualisation
minus
modern use of base 60
modern use of Greek numbers
modern use of Roman numbers
month lengths
mowing song
mu - Greek number symbol for forty
multiplication - Arabic numbers
multiplication tables
multiplication - associative
multiplication - commutative
multiplication - distributive over addition and subtraction
multiplication - long multiplication
multiplication - on paper
multiplication - order of calculation
multiplication - patterns to help learning tables
multiplication - practise
multiplication - using fingers
multiplication - using calculating machines
multiplication - types of numbers
multiplication in binary
multiplication in Egyptian numbers
multiplying by using fingers
multiply by nine using fingers
multiply by six to nine using fingers
multiply decimals by ten
Muslim use of numbers

## N

Napier's bones
Napier's bones - how to use Napier's bones
Napier's bones - interactive
Napier's bones - to cut out
Napier's bones - using for long multiplication and division
natural numbers - types of numbers
natural numbers - infinity
natural occurrence of Fibonacci numbers
negative - types of numbers
no zero - comparison between number systems
no zero - Babylonian numbers (intermittent)
no zero - Chinese financial numbers (intermittent)
no zero - Chinese standard numbers (intermittent)
no zero - Chinese rod numbers
no zero - Egyptian numbers
no zero - Greek numbers
no zero - Roman numbers
no zero - tallies
nu - Greek number symbol for fifty
number counters - all
number counter - abacus
number counter - Arabic
number counter - Babylonian
number counter - bases other than ten
number counter - binary
number counter - Chinese financial numbers
number counter - Chinese standard numbers
number counter - Chinese rod numbers
number counter - Chisenbop
number counter - Egyptian
number counter - Greek
number counter - Mayan
number counter - Roman
number counter - tallies
number counter - words for numbers
number counter - up to 100,000 on one hand
number pairs that add to ten
numbers as words
numerator of fraction
numerical values of words - Greek

## O

omega - Greek number symbol for eight hundred
omicron - Greek number symbol for seventy
on the first day of Christmas
once I caught a fish alive
one
one - properties
one - "as sure as one and one is two"
one - Boolean logic
one man went to mow
one potato
one, two, three, four, five, once I caught a fish alive
order of calculation
ordinals - types of numbers
other bases

## P

pairs of numbers that add to ten
paper - division
paper - multiplication
paper - subtraction
partial numbers
partridge in a pear tree
patterns to help learning tables
percentages
percentages - compare with decimals and fractions
phi - Greek number symbol for five hundred
pi - Greek number symbol for eighty
pi - ratio of circle's circumference to its diameter
pi - what is it?
pi - calculate
pi - history
pi - various formulae
pictogram graph
piece of rope - Egyptian number symbol
pine cones
plus
polygons - pi
positional - comparison between number systems
positional - Arabic numbers
positional - Babylonian numbers (also unary)
positional - bases other than ten
positional - binary
positional - Chinese rod numbers
positional - Mayan numbers (also unary)
positive - types of numbers
potato song
powers - types of numbers
practise division
practise factors
practise mental arithmetic
practise multiplication
practise subtraction
prime numbers
prime numbers - infinity
projects - information for teachers
proof root two is irrational
proper fractions
psi - Greek number symbol for seven hundred

quicksort
quartile

## R

raising to a power - types of numbers
rationals - infinity
rationals - partial numbers
rationals - types of numbers
reals - infinity
reals - types of numbers
reducing fractions
remainder
remembering Roman number symbols
rho - Greek number symbol for a hundred
rod Chinese numbers
Roman numbers
Roman number counter
Roman number symbols
Roman numbers - how they work
Roman numbers - how to remember the symbols
Roman numbers - modern use
Roman numbers - no zero
Roman numbers - numbers greater than 4000
Roman numbers - unary
rope - Egyptian number symbol
root of -1 - i
root of i
root 2
roots - types of numbers
roots - where they're found
rounding decimals

## S

sampi - Greek number symbol for nine hundred
savings calculator
scientific calculator
score
series for e
series for golden ratio
series for natural log
series for pi
series for root 2
sheep counting
shell - Mayan number symbol for zero
sigma - Greek number symbol for two hundred
significant figures of decimals
simple abacus
simple abacus number counter
simple calculator
signing numbers with hands
site map
slide rule
songs based on numbers
songs - green grow the rushes, O
songs - once I caught a fish alive
songs - one man went to mow
songs - one potato
songs - partridge in a pear tree
songs - ten green bottles
sorts
special words for numbers
spiral using Fibonacci numbers
square root of two - proof that it's irrational
square root of two - visualise
square root of two - value
square root of two - where roots are found
standard Chinese numbers
stylus - Babylonian numbers
subtraction - Arabic numbers
subtraction tables
subtraction - calculation machines
subtraction - not associative
subtraction - not commutative
subtraction - larger numbers
subtraction - practise
subtraction - with borrow (method 1)
subtraction - with carry (method 2)
subtraction - with carry (method 3)
subtraction - types of numbers
Sumerians origin of Babylonian numbers
sums
symbol - infinity
symbol - pi
symbols - Arabic number
symbols - Babylonian number
symbols - bases other than ten
symbols - binary number
symbols - Chinese financial number
symbols - Chinese standard number
symbols - Chinese rod number
symbols - Egyptian numbers
symbols - Greek numbers
symbols - Mayan numbers
symbols - Roman numbers
symbols - tallies

## T

tables - multiplication
tables - subtraction
tallies
tallies counter
tallies symbols
tallies - how they work
tallies - unary
tallies - no zero
take away
tau - Greek number symbol for three hundred
teachers - information
ten green bottles
ten thousand counting on one hand
theta - Greek number symbol for nine
Thoth's role in Egyptian fractions
times
tree sort
types of numbers
types of numbers - cardinals and Ordinals
types of numbers - complex numbers
types of numbers - imaginary numbers
types of numbers - infinity
types of numbers - integers
types of numbers - irrationals
types of numbers - natural numbers
types of numbers - multiplication
types of numbers - negative
types of numbers - positive
types of numbers - rationals
types of numbers - reals

## U

unary - comparison between systems
unary - Egyptian numbers
unary - Roman numbers
unary - Babylonian numbers (also positional)
unary - Mayan numbers (also positional)
unary - tallies
uncountable infinite sets
upsilon - Greek number symbol for four hundred

## V

V - Roman number symbol for five
value of e
value of golden ratio
value of pi
value of square root of two
visualise million
visualise square root of two
vulgar fractions

## W

water lily - Egyptian number symbol
website map
Welsh words for numbers
where roots are found
word system - comparison between number systems
word system - Chinese financial numbers
word system - Chinese standard numbers
words for numbers
words for numbers counter
words - alphabetical order of number words
words - big numbers
words - counting sheep
words - English numbers
words - number words in French and German
words - songs based on numbers
words - special words for numbers
word system - numbers as words
words having numerical values - Greek

## X

X - Roman number symbol for ten
xi - Greek number symbol for sixty

## Z

zero
zero - properties
zero - history
zero - comparison between number systems
zero - Arabic numbers
zero - Babylonian numbers
zero - bases other than ten
zero - binary
zero - Chinese financial numbers
zero - Chinese standard numbers
zero - Chinese rod numbers - none
zero - Egyptian numbers - none
zero - Greek numbers - none
zero - Mayan numbers
zero - Roman numbers - none
zero - tallies - none
zero - types of numbers
zeta - Greek number symbol for seven