a rectangular visual model resembling a piece of tape with divisions used to assist mathematical calculations. • also known as a divided bar model, fraction strip, length model or strip diagram.

a pair of numbers whose sum is zero, e.g. +1, -1. • used to illustrate addition and subtraction problems with positive and negative integers.

acronyms to help remember the order of operations. • mathematical operations have to be done in the correct order or the answer will be wrong. • B brackets, I or O indices or orders and roots, D divis [..]

a multiple that is shared by two or more numbers.

coordinates are written as ordered pairs of numbers or letters and numbers. • the first term is called the abscissa and denotes the horizontal position. • the second term is called the ordinate and de [..]

opposite direction to the way the hands on the clock rotate.

a line graph which joins the midpoints of the top of the bars on a frequency histogram. • a frequency polygon gives a picture of the shape of the data distribution.

most: the largest value or amount. • more: the larger value or amount.

the amount of money borrowed or invested, on which interest is calculated.

all the factors of a number except 1 and the number itself.