Arithmetic / Numeracy
Aids for basic arithmetic and other topics.- Operations
- Associativity
- Commutativity
- Distibrutivity
- Identity
- Number bases
- base 10 : hundreds, tens, units
Arithmetic
- multiplication table
- multiplying decimals
- multiplying large numbers
- grid method for multiplying
- Gelosia Multiplication
- multiplying by 10, 100, 1000
- division:-short division
- division - long division
- division - dividing a decimal
- division - dividing by a decimal
- dividing by 10, 100, 1000
order of operations
- simplifying fractions
- simplifying fractions using prime factors
- improper to mixed number
- mixed number to improper
- adding/subtracting fractions
- multiplying fractions
- dividing fractions
- dividing fractions- alternative method
- calculating fractions of amounts
- algebraic fractions
- converting fractions to percentages
- converting fractions to decimals
- fractions, percentages, decimals you must know
- percentages
- wholes, halves, thirds fifths as percentages
- converting percentages to decimals
- converting percentages to fractions
- calculating percentages: using fractions
- calculating percentages: using decimals
- calculating percentages: using units
- calculating percentages: using a calculator
- calculating vat
- calculating percentages: using fractions
- integers
- adding negative numbers
- subtracting negative numbers
- multiplying integers
- dividing integers
Ratio
- Ratio
- Equivalent ratios
- Equivalent ratios - Vedic maths
- Proportion
- Sharing in Proportion
- Map scales
- ratio - direct proportion
- ratio - indirect proportion
- Variation
- the rule of 3
- Unitary conversions
- time units
- 12 and 24 hour clock
- 12 hour clock
- 24 hour clock
- converting 12 hour clock to 24 hour clock
- converting 24 hour clock to 12 hour clock
- calculating time differences
- Unitary conversions
- SI Units
- measurements - length conversions
- measurements - mass conversions
- measurements - volume conversions
- Unitary conversions
- by the rule of 3
- profit and loss
- percentage profit and loss
- back / reverse percentage
- vat
- appreciation
- depreciation
- payslips
- net pay
- overtime
- superannuation
- income tax
- national insurance
- utility bills
- loans
- hire purchase
- insurance
- simple interest
- compound interest
- foreign exchange
- Unitary conversions
- Banking and Finance links
© Alexander Forrest