Expresss $12 c m 5 m m$ as centimetre $(c m)$ using decimals.

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Solution

We know that, $10 m m = 1 c m$ .
We are going from smaller unit to greater unit. So, we will divide the smaller unit to get the bigger unit.
$12 c m 5 m m = 12 c m + 5 m m 12 c m 5 m m = 12 c m + \frac{5}{10} c m 12 c m 5 m m = 12 c m + 0.5 c m$
Therefore, $12 c m 5 m m = 12.5 c m$ .

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