# What is 1*dm in cm?

$1 \cdot \mathrm{dm} \equiv {10}^{-} 1 \cdot m \equiv 0.01 \cdot m \equiv 10 \cdot c m$
The prefix $\text{deci} \equiv {10}^{-} 1$. The prefix $\text{centi} \equiv {10}^{-} 2$. The prefix $\text{milli} \equiv = {10}^{-} 3$. And going the other way, the prefix $\text{kilo} \equiv {10}^{3}$, and the prefix $\text{mega} \equiv {10}^{6}$.
And so $1 \cdot \mathrm{dm} \equiv 1 \times {10}^{-} 1 \times 1000 \cdot m m \equiv 100 \cdot m m \equiv 10 \cdot c m$.
We use $1 \cdot {\mathrm{dm}}^{3} \equiv {\left({10}^{-} 1 \cdot m\right)}^{3} \equiv \frac{1}{1000} \cdot {m}^{3} \equiv 1 \cdot L$ as a convenient measurement of volume.