Maths Terms for 11-13 Yr Olds

A fraction expressed as the number of parts per hundred and recorded using the notation %. Example: One half can be expressed as 50%; the whole can be expressed as 100%.

The length of any circle divided by the length of its diameter is a constant called pi, which has the symbol below.

Pi is an irrational number. It has an infinite number of non-repeating decimal places. To 8 decimal places, pi is 3.14159265.

The value of a digit that relates to its position or place in a number. Example: in 1482 the digits represent 1 thousand, 4 hundreds, 8 tens and 2 units respectively; in 12.34 the digits represent 1 ten, 2 units, 3 tenths and 4 hundredths respectively.

The process of marking points. Points are usually defined by co-ordinates and plotted with reference to a given coordinate system. Noun - a collection of these points on a graph.

Any number greater than zero. Where a point on a line is labelled 0 and equally spaced points to one side of it are labelled +1, +2, +3 etc., these, and the numbers represented by decimal points between them, are positive numbers and are read ’positive one, positive two, positive three’ etc.

The factors of a number that are prime. Example: 2 and 3 are the prime factors of 12 (12 = 2 x 2 x 3). See also 'factor'.

The process of expressing a number as the product of factors that are prime numbers.

The result of multiplying one number by another. Example: The product of 2 and 3 is 6 since 2 x 3 = 6.

A chain of reasoning that establishes the truth of a proposition.

A proper fraction has a numerator that is less than its denominator.

Example: 2/5 is a proper fraction whereas 9/4 is improper.