#### Answer

$22,267$

#### Work Step by Step

Given the numbers $7, 6, 2$ we will use each digit at least one time to write the smallest five-digit number possible.
The smallest digit is $2$. We will place the smallest digit ($2$) in the largest valued column (ten-thousands).
Next, we will place the smallest digit ($2$) in the second largest valued column (thousands).
Next, we will place the smallest digit ($2$) in the third largest valued column (hundreds).
Next we will place the second smallest digit ($6$) in the fourth largest valued column (tens).
Finally, we will place the third smallest digit ($7$) in the fifth largest valued column (ones).
$22267$
Separate each group of three digits with a comma.
$22,267$