Question

Write the following as decimals.

$3\mathrm{ones}9\mathrm{tenths}$

Answer 1

We know that $3\mathrm{ones}$ means $3$ and $9\mathrm{tenths}$ means $\frac{9}{10}=0.9$ ($\because 1\mathrm{tenths}$ means $\frac{1}{10}=0.1$)

$\therefore$The decimal form of $3\mathrm{ones}9\mathrm{tenths}$ is $3+\frac{9}{10}=3+0.9=3.9$.