Answer: the smallest number out of the four is 0.13
Explanation:
First, let's think about the number 13. It's a whole number and it's pretty big. It's definitely larger than the other numbers we're looking at today.
Next, let's take a look at 0.13. This number is a decimal, which means it's a number that has a whole number part and a fractional part. The whole number part is 0 and the fractional part is 13. So, 0.13 is smaller than 13.
Now, let's move on to 1.03. This is also a decimal and it's a little bit bigger than 0.13, but smaller than 13.
Finally, we have 1.3. This number is a decimal with a whole number part of 1 and a fractional part of 3. It is bigger than 0.13 and 1.03 but smaller than 13.
So, we can see that the smallest number out of the four is 0.13.