KeywordMeaning
=Sign for Equal To
>Sign for Greater Than
additionIncreasing the value of one number by the value of another (also add, adding)
approximateA value that is close to a more accurate value; normally gives the size of a number (number of digits).
ascendingDescribes the order of numbers, where numbers increase in value
bidmasOrder of operations: Brackets; Indices; Division; Multiplication; Addition
bodmasSee BIDMAS
box methodA method for carring out multiplication (also Grid Method)
bracketsBrackets (always shown in pairs, and may be shaped as (), [] or {}) are used to control the order of operation (see BIDMAS)
calculateWork out the answer
cancellingReducing the value of both the numerator and denominator of a fraction by dividing them both by an equal amount. The value of the fraction remains the same.
centi-Small number prefix: 1 x 10-2
chunkingA method for carrying out a division. Long Division is a preferred method.
coefficientThe number at the start of an algebraic term.
commutativeAn operation on two numbers, where the order of the numbers is not important to the answer
complementElements that do not belong to a perticular set
completing the squareAdding a constant term to a quadratic expression to make it a perfect square.
compound interestWhen an original amount has had interest added over one period, and the original+interest is used as the starting amount fo rthe next period.
compound measureA measurement that includes more than one type of unit.
continuousA measurement from a scale or rule, and which can deliver different degrees of accuracy.
cubeCubing is multiplying three instances of the number together.
cube rootWhat number, when three versions of it are multiplied together, gives the number being cube rooted?
cubingSee cube
deci-Small number prefix: 1 x 10-1
decimalA number that contains a decimal point. the number consist of an integer part and a decimal part.
decimal partThat part of a number that is less than 1
decimal placesThe number of places after the decimal point
decimal pointThis signifies the split between the integer part and the decimal part of a number
denominatorThe number on the bottom of a fraction. The number that is doing the dividing (divisor)
densityThe amount of mass for a given volume.
descendingDescribes the order of numbers, where numbers decrease in value.
differenceThis will often mean to carry out a subtraction
digitsSingle numbers (0, 1, 2, 3, 4, 5, 6, 7, 8, 9) that may be part of a larger number
discreteSomething that can be counted; such as cars, or persons.
divisionA calculation to determine how many instances of one number will go into another
divisorA number that is dividing into another number
elementsIn Set Theory: individual items that make up a set
ellipsesA symbol ... (three dots) that means carry on a sequence of numbers
equal toTwo values are the same, represented by the = sign
equivalent fractionA fraction that has the same value as another fraction, although the numerators and denominators will be different
estimateAn approximate, or rough, calculation based on less accurate or simplified numbers
estimatingA calculated approximation of an answer
evaluateWork out the answer. Means the same as calculate
even numbersIntegers ending in 0, 2, , 6 or 8
expandingMultiplying out the brackets in an expression, so the brackets are removed.
expressionA set of numbers and letters which describes a situation, where the letters indicate unknown values.
factorAn integer that will divide into another integer without leaving a remainder
factorising(Number) Identifying the factors of a number; (Algebra) Removing brackets from an expression by identifying common factors.
figuresAnother name for digits
formulaA predefined method that allows calculation of an unknown variable, when other variables are known.
fractionA number that is divided by another number
fraction partThe part of a Mixed Number that contains the fraction
functionA step, or set of steps, that will perform work on a number or value.
giga-Large number prefix: 1 x 109
greater thanOne value is greater than the other; the greater number is on the left of the > symbol
greater than or equal toOne value is greater than or equal to the other; the greater/equal number is on the left of the ≥ symbol
grid methodA method used to carry out a multiplication
gross amountA starting amount. Normally associated with a Net Amount, which is the value of what is left after other values have been applied.
hcfSee Highest Common Factor
highest common factorThe highest integer that will divide INTO two other integers. The HCF is always smaller than the two integers being examined.
identityAn expression that has the same value as another expression, although written in a different form.
improper fractionA fraction that consists of an Integer Part and a Fractional Part. See also Mixed Number.
indexA small number following a given number, indicating how many instances of the number are multiplied together (also Indices)
indicesPlural of index
inequalityAn equation that results in a set of answers, all of which may be true for that equation.
integerA whole number used to count objects; has no decimal or fraction part
integer partThe whole number part of a Decimal or Fraction
interestAn amount that increases or decreases an original amount by a percentage of the opriginal amount over a given time period.
intersectIn Set Theory: where elements belong in both (or more) sets
inverseThe opposite. Carrying out an inverse operation on a number will give the original number
irrationalAn irrational number cannot be written as a fraction using integers
kilo-Large number prefix: 1 x 103
laws of indicesRules about multiplying and dividing the same base number when raised to powers of that number
lcmSee Lowest Common Multiple
less thanOne value is smaller than the other: the smaller number is on the left of the < sign
less than or equal toOne value is smaller than or equal to the other: the smaller/equal number is on the left of the ≤ sign
like termA term in an expression that has the same letter and power as another term in the same expression.
limitsThe accuracy of a tolerance.
long divisionA division where the divisor consists of more than one digit
long multiplicationA multiplication where the multiplier consists of more than one digit
lower boundThe lowest value that a measurment may be, given a tolerance.
lowest common multipleThe lowest multiple shared by two integers. An LCM is always greater than the two integers being compared
mega-Large number prefix: 1 x 106
metric unitsA measurement system for length, mass and capacity based on multiples of 10.
micro-Small number prefix: 1 x 10-6
milli-Small number prefix: 1 x 10-3
minusTo take a value away from a number with another value
mixed numberA number consisting of an Integer part and a Fraction Part
multiplicationincreasing a number by itself a set number of times (also Multiply, Times)
multiplierThe number of times a number is added to itself
multiplier (percentages)A decimal number used to increase or decrease an original value by a set percentage.
nano-Small number prefix: 1 x 10-9
negativeA number less than zero
negative numbersAny number with a value of less than zero
net amountThe amount left after other amounts have been taken from a starting amount (which is the Gross Amount)
not equalTwo values being compared are different, represented by the ≠ sign
number lineA line showing a range of numbers increasing or decreasing in value
numeratorThe number on top of a fraction, the number that is being divided.
odd numbersIntegers ending in 1, 3, 5, 7 or 9
operationA function that changes what a number or variable is worth, such as Adding or Subtracting.
operatorsSomething that acts on a value to change it (see also Operation)
perfect squareAn expression that consists only of a squared term.
permutationsSelection or option.
pico-Small Number: 1 x 10-12
place valueThe value of a digit based on its position in a number
plusIncreasing the value of a number by the value of another
positiveA number greater than zero
powerThe index value of a number: see Square (power of 2), Cube (power of 3) of a number
prime numbersA number with two, and only two, factors
principalThe original, starting, amount of money where interest is added or subtracted.
product of the prime factorsThe set of prime numbers which, when multiplied together, give the original number
product ruleNumber of permutations = n1n2n3...
proper fractionA fraction where the denominator is larger than the numerator.
rationalA rational number can be expressed as a fraction, with both numerator and denominator as integers
rationalising the denominatorRemoving a surd as the denominator in a fraction.
reciprocalThe inverse of a number: the number is divided into 1
recurring decimalThe decimal part of the number repeats itself forever: this may be a single number, or a group of numbers.
roundingMaking a number less accurate but easier to handle. Rounding takes place to a multiple of 10.
setsA defined list of numbers or values. In a Venn Diagram, the set will be shown as a circle enclosing the numbers or values
sfShort for Significant Figures
short divisionA division where the divisor consists of only one digit
short multiplicationA multiplication where the multiplier consists of only one digit
significant figuresThe digits at the start of a number. Leading zeroes are ignored.
simple interestWhere interest from one period is not added to the original amount when calculating the interest for the next period.
simplest formA fraction where the Numerator and the Denominator have no common factors
simplifyingChanging a Fraction into its Simplest Form
sortTo place a list of numbers in order of value: either increasing or decreasing in value.
squareMultiply a number by itself. Shown by a small 2 following, above, the number.
square rootWhat number, multiplied by itself, would give the number being square rooted?
square termA term (which may consist of a variable and a constant within a bracket) which is squared.
squaringSee sequare
standard formA number that consists of a decimal part between 1 and 10, and a power of 10 multiplier part.
subsetAs set where all the eleemnts belong to a larger set
substitutionReplacing variables (letters) in an expression with a known number.
subtractionReduce the value of one number by the value of another (also Subtract, Subtracting, Minus)
surdAn irrational number; normally includes a root; with the denominator as an integer
symbol ∛See cube root: note the small 3 which is part of the cube root sign
symbol <Less Than; the value on the left is smaller than the value on the right
symbol =Equal To, meaning two values are the same
symbol >Greater Than; the value on the left is larger than the value on the right
symbol √Square root: what number multiplied by itself would give the number being square rooted
symbol ≠Not Equal, meaning two values are different
symbol ≤Less Than or Equal To; the value on the left is smaller than or equal to the value on the right
symbol ≥Greater Than or Equal To: the value on the left is greater than or equal to the value on the right
systematicCompleting a task in an ordered manner
take awaySame as subtract
tera-Large number: 1 x 1012
termA part of an expression, separated from other parts by arithmetic operators.
terminating decimalA decimal number which ends after a number of digits
toleranceA description of how accurate a measurement may be taken.
top-heavyA mixed Number, where the Integer Part is multiplied by the denominator and added into the Numerator
trial and improvementEstimating an answer; and progressively working towards a more accurate answer
unionIn Set theory; the list f elements that come from combining two (or more) sets
universal setThe set that contains all possible elements that describe a situation
unlike termWhen two terms are being compared, they are unlike if either the letter or power is different.
upper boundThe highest value a measurement may be, given a tolerance.
value added taxSales tax that is added, as a percentage, to an item being purchased.
variableA letter within an expression: the variable represents a number.
vatSee Value Added Tax,
venn diagramsA diagram used to compare the members, or contents, of two data sets.
vertex (of a graph)The peak, or trough (or turning point) of a graph.
whole numberAnother name for an Integer.
work outComplete a calculation to obtain an answer
{ }In Set Theory: elements contained between these brackets belong to a set
In Set Theory; a member belongs to a set
In Set Theory; a member does not belong to a set
Sign for a square root (the number being rooted immediately follows the sign)
Sign for approximately equal to
Sign for Not Equal To
Sign for Less than or Equal To
Sign for Greater Than or Equal To

The wtMaths App is available for the iPhone and iPad on the App Store. The app is loaded with exam-style questions: in-app purchases are required to unlock all of the questions.