Answer:
.053
Explanation:
The decimal places go all the way out to the thousandths place. In order to properly compare all of the decimals, it's best to add zeroes in place of any empty decimal places in any of the numbers.
.5 would now be .500
.53 would now be .530
And the other two numbers are already in the thousandths place, so those don't need to be changed.
Now, we can put all the numbers next to each other and compare. You compare decimals the same way you compare normal numbers- just act as if the decimal points aren't there.
If the numbers were 500, 530, 053, and 503, we know that 053 would be the smallest number. Therefore, the decimal .053 is the smallest.
I hope this helps! :) have a lovely day!!