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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