  # Negative Indices

In this worksheet, students understand and use negative indices. Key stage:  KS 3

Curriculum topic:   Number

Curriculum subtopic:   Understand Integer Powers/Real Roots

Difficulty level:   #### Worksheet Overview

What is a negative indices? A number or term with a negative index means it can be written as a reciprocal of that number.

For example, And: How do we get negative indices?

Negative indices occur when multiplying or dividing two terms where the the result of adding or subtracting the powers gives a negative value.

For example,

a3 × a-5 = a3 + - 5 = a-2 = 1/a2

or

p1 ÷ p2 = p1-2 = p-1= 1/p

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