Key Words and Meanings - Year 8 Maths
  • Types of Numbers, Equations, Angles, Constructions and Probability
    MultiplicationThe basic idea of multiplication is repeated addition.  
    DivisionDivision is splitting into equal parts or groups. It is the result of "fair sharing". We use the ÷ symbol, or sometimes the / symbol to mean divide 
    FactorFactors are numbers we can multiply together to get another number 
    HCFThe highest number that divides exactly into two or more numbers.  
    MultipleThe result of multiplying a number by an integer (not by a fraction). 
    LCMThe smallest positive number that is a multiple of two or more numbers. 
    PowerThe power of a number says how many times to use the number in a multiplication. It is written as a small number to the right and above the base number.  
    RootWhere a function equals zero 
    PrimeA Prime Number is a number that has two distinct factors, itself and one.  
    ParallelAlways the same distance apart and never touching. 
  • Percentages, Congruent Shapes, Further Sequences, Surface Area and the Volume of a Prism
    CalculationTo work out an answer, usually by adding, multiplying etc. 
    PercentagePercent means parts per 100 The symbol is % 
    Congruent The same shape and size. Two shapes are congruent when you can Turn, Flip and/or Slide one so it fits exactly on the other. 
    SequenceA list of numbers or objects in a special order. 
    nth termA formula that describes the pattern in a linear or quadratic sequence.  
    FibonacciThe sequence of numbers: 0,1,1,2,3,5,8,13,21,... Each number equals the sum of the two numbers before it.  
    PrismA solid object with two identical ends and flat sides. The shape of the ends give the prism a name, such as "triangular prism" • The cross section is the same all along its length • The sides are parallelograms (4-sided shape with opposites sides p 
  • Graphs, Powers & Significant Figures, Drawing & Interpreting Tables & Graphs
    GraphA diagram of values, usually shown as lines or bars. 
    LinearAn equation that makes a straight line when it is graphed. 
    EquationAn equation says that two things are equal. It will have an equals sign "=" like this:  
    GradientHow steep a straight line is. Also called "slope". 
    QuadraticAn equation where the highest exponent of the variable (usually "x") is a square (2). So it will have something like x2, but not x3 etc. A Quadratic Equation is usually written ax2 + bx + c = 0 
    Power The power of a number says how many times to use the number in a multiplication. It is written as a small number to the right and above the base number. 
    Significant Figureeach of the digits of a number that are used to express it to the required degree of accuracy, starting from the first non-zero digit. 
    Standard FormAnother name for "Scientific Notation", where a number is written in two parts: • First: just the digits (with the decimal point placed after the first digit), • Followed by: ×10 to a power that will the decimal point back where it should be. 
    DiagramA drawing used to describe something. 
    Scatter GraphA graph of plotted points that show the relationship between two sets of data. 
  • Algebraic Expressions, Shape & Ratio
    AlgebraAlgebra uses letters (like x or y) or other symbols in place of values, and plays with them using special rules.  
    Like Terms"Like terms" are terms whose variables (and their exponents such as the 2 in x2) are the same. In other words, terms that are "like" each other. 
    Expanding bracketsExpand is when we remove the ( )  
    Algebraic expressionNumbers, symbols and operators (such as + and ×) grouped together that show the value of something. 
    Index NotationThe index of a number says how many times to use the number in a multiplication. It is written as a small number to the right and above the base number. 
    RatioA ratio shows the relative sizes of two or more values. Ratios can be shown in different ways. Using the ":" to separate example values, or as a single number by dividing one value by the total. 
    AreaThe size of a surface. The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle. 
    VolumeThe amount of 3-dimensional space an object occupies. Capacity. 
    ScaleThe ratio of the length in a drawing (or model) to the length of the real thing 
  • Fractions & Decimals, Direct & Indirect Proportion & Circles
    FractionPart of a whole.  
    IntegerA number with no fractional part.  
    MultiplicationThe basic idea of multiplication is repeated addition. But as well as multiplying by whole numbers, we can also multiply by fractions, decimals and more. 
    DivisionDivision is splitting into equal parts or groups. It is the result of "fair sharing". We use the ÷ symbol, or sometime 
    CircumferenceThe distance around the edge of a circle (or any curvy shape). It is a type of perimeter 
    FormulaA special type of equation that shows the relationship between different variables. 
    AreaThe size of a surface. The amount of space inside the boundary of a flat (2-dimensional) object such as a triangle or circle.  
  • Equations & Formulae, Comparing Statistical Distributions & Statistical Investigation
    EquationAn equation says that two things are equal. It will have an equals sign "=" like this: 
    VariableA symbol for a number we don't know yet. It is usually a letter like x or y. 
    FormulaeA special type of equation that shows the relationship between different variables.  
    FrequencyHow often something happens (usually during a period of time). 
    PolygonA plane shape (two-dimensional) with straight sides. 

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