Convert the following length from $mm$ to $cm$ using decimals.
$6 c m 23 m m$

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Solution

Since, we know that $1 c m = 10 m m \Rightarrow 1 m m = 0.1 c m$
Thus, $23 m m = 23 \times 0.1 c m = 2.3 c m$
$\Rightarrow 6 c m 23 m m = 6 c m + 23 m m = 6 c m + 2.3 c m = 8.3 c m$
Hence, the required answer is $6 c m 23 m m = 8.3 c m$ .

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