add - find total of numbers, subtract - difference between numbers, operations - add, subtract, multiply, divide, exchange - move numbers between columns, column method - written calculation in columns, factors - what a number is divided by e.g. 20 = 4x5, 2x10, common factors - 20 = 4x5, 2x10 30 = 3x10, 6x5 so 5, 10, largest common factor - biggest factor shared by two or more numbers, multiples - times tables, common multiples - 2,4,6,8 3,6,9,12 6 is in both, divisible - can be divided by, prime numbers - only has two factors, one and itself, composite numbers - a whole number with more than two factors, square numbers - a number multiplied by itself e.g. 5x5, order of operations - () square/cube divide multiply add subtract, brackets - ( ), powers - squared, cubed, estimation - rounding to give a close answer,

Four Operations

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