Help your students prepare for their Maths GCSE with this free index laws worksheet of 53 questions and answers
The laws of indices are a set of rules which can be used to simplify questions involving indices. They are sometimes known as power laws or the rules of indices (exponents). A strong understanding of index form and index notation is helpful when using the laws of indices.
The first law of indices can be used when terms with the same base are multiplied together; in order to simplify the expression the powers can be added. The next law of indices can be used when terms with the same base are divided; in order to simplify the expression the powers can be subtracted. Another law of indices can be used when a term is raised to a power of a power; in order to simplify the expression the powers are multiplied.
Index laws also include negative indices (or negative powers) which involve writing the reciprocal of a number.
At Higher GCSE fractional indices are explored including square roots and cube roots. In the fractional indices the denominator of a fraction gives the root and the numerator gives the power the resulting term is raised to.
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