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Using prefixes - milli and micro.

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Express {x} milligrams ($mg$) in micrograms ($\\mu g$). 

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There are $1000\\mu g$ in $1mg$. To work out the conversion: $\\var{x}*1000 = \\var{answer}$.

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Use this link to find some resources which will help you revise this topic.

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[[0]]$\\mu g$

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