To order real numbers, start by writing all the numbers in the same form.

Start by writing all the numbers as decimals.

First, convert

$\frac{3}{5}$ and

$\frac{1}{3}$ to decimals.

$\begin{array}{rcl}\frac{3}{5}& =& 3\xf75\\ & =& 0.6\end{array}$

$\begin{array}{rcl}\frac{1}{3}& =& 1\xf73\\ & \approx & 0.33\end{array}$

Next, write

$3.5\times {10}^{-2}$ in standard notation.

$3.5\times {10}^{-2}=0.035$

Then, order the numbers from least to greatest.

$0.035,0.33,0.349,0.6$

$3.5\times {10}^{-2},\frac{1}{3},0.349,\frac{3}{5}$