GCSE Maths

Standard Form

writing the speed of light in standard form

What about numbers that are very small? How can they benefit from being written in standard form? Let's try 0·092.

We need to move the 9 and the 2 two places to the left (so we have a number more than 1 but less than 10). We indicate that the number needs to be divided by 10 twice using a negative power:

9·2 × 10-2

Now try the example 0·00000864.

The numbers 8, 6 and 4 (we always ignore 0's) need moving 6 places to the left:

8·64 × 10-6

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