| algorithm | a logical, arithmetical or computational procedure that if correctly applied ensures the solution of a problem |
| analogue clock | a clock on which hours, minutes and sometimes seconds are indicated by hands on a dial |
| are | a unit of area equal to 100 square metres |
| associative | an operation such as multiplication or addition is associative if the same answer is produced regardless of the order in which the elements are grouped, e.g.
(2 + 3) + 5 = 10, 2 + (3 + 5) = 10 |
| cardinal number | a number denoting quantity but not order in a set
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| commutative | giving the same result irrespective of the order of the elements in an operation, e.g. for addition and multiplication 6 + 2 = 8, 2 + 6 = 8, 5 x 7 = 35, 7 x 5 = 35 |
| composite number | a number with more than two factors that is not a prime number, e.g. 6, 10 |
| denominator | the divisor in a fraction diameter a straight line connecting the centre of a circle with
two points on the perimeter |
| distributive | the same result is produced when multiplication is performed on a set of numbers as when performed on the members of the set individually, e.g. 5 x 4 = (3 + 2) x 4 = (3 x 4) + (2 x 4) |
| dividend | a number or quantity to be divided by another number or quantity |
| divisor | a number or quantity to be divided into another number or quantity |
| equation | a mathematical sentence with an equals sign |
| hectare | a unit of area equal to 100 ares |
| line symmetry | a shape has line symmetry if one half of the shape can be folded exactly onto the other half |
| number sentence | an equation or statement of inequality, e.g. 4 + x = 11, 4 2 < 12 or 2 + 5 = 7 |
| numerator | the number above the line in a fraction |
| ordinal number | a number denoting relative position in a sequence, e.g. first, second, third perimeter the sum of the length of the sides of a figure or shape |
| prime factor | a factor that is a prime number |
| prime number | a whole number that has only two factors, itself and 1, e.g. 2, 3, 7 |
| product | the result of multiplying two numbers
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| quotient | the result of dividing one number by another number |
| radius | a line from the centre of a circle to a point on the circumference; a radius is half of the diameter |
| ratio | the relationship between two numbers of the same kind; e.g. the ratio of 2 kg to 6 kg is 2 : 6 |
| subitise | tell at a glance, without counting, the number of items in a set |
| subtrahend | the number to be subtracted from another number, e.g. 10 - 4 (4 is the subtrahend)
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| tessellation | shapes tessellate if they fit together exactly, form a repeating pattern and make an angle of 360° at the points of contact |
| variable | a letter or symbol that stands for a number, for example y + 7 = 12 |