1. Maths Unit 15 – Indices and Standard Form
Square rooting a number is the inverse operation to squaring a number.
Cube rooting a number is the inverse operation to cubing a number.
Working with negative powers
To simplify a number with a negative power you follow this rule.
Cube Roots
E.g. 5 −2 can be simplified to 1 25
Standard Form
Standard form is a general way of writing very large and very small numbers in a uniform way.
It is written as a number between 1 and 10 multiplied by a power of 10.
Key words and definitions
Square number - the product of a number multiplied by itself, e.g. 1, 4, 9, 16.
Square root - The square root of a number is a value that, when multiplied by itself, gives the number, e.g. 4 × 4 = 16, so a square root of 16 is 4
Cube number - The result of using a whole number in a multiplication three times, e.g. 3 × 3 × 3 = 27, so 27 is a cube number.
Cube Root -  cube root of a number is a special value that, when used in a multiplication three times, gives that number, e.g. 3 × 3 × 3 = 27, so the cube root of 27 is 3
Exponent / Power / Indice The exponent/power or indice of a number says how many times to use that number in a multiplication. It is written as a small number to the right and above the base number.