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Read Standard Index Form Numbers with Negative Indices

In this worksheet, students will read and write standard form numbers with negative indices as normal numbers.

'Read Standard Index Form Numbers with Negative Indices' worksheet

Key stage:  KS 3

Year:  Year 8 Maths worksheets

Curriculum topic:   Number

Curriculum subtopic:   Interpret/Compare Standard Form Numbers

Difficulty level:  

Worksheet Overview

Standard index form is a shorthand way of writing a very large or a very small number.

It is written as a  number between 1 and 10 (but not equal to 10) multiplied by a power of 10, for example 2.94 × 102 or 4.8 × 10-3.


You can probably see how much easier it is to manage numbers when they are in standard form - counting all those zeros can be quite tricky! It can be incredibly useful in science if you want to compare the magnitude of things that are very large (such as distances in space) or very small (such as the size of bacteria or cells in the body).


virus cells


In this activity, we will just look at very small numbers.



Change 5.83 × 10-6 into a normal number.


We divide 5.83 by 10 six times.

Each digit therefore moves 6 places to the right.

This gives the number 0.00000583.  


Other Examples

1.122 × 10-7 = 0.0000001122

6 x 10-8 = 0.00000006


Let's have a a go at some questions.

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