Order from least to greatest.

1.2; 0.12; 12; 0.012

0.012; 0.12; 1.2; 12

To order the given numbers from least to greatest, we compare the numbers by their values.

First, let's compare the whole numbers:

0.012 < 1.2 < 12

Next, let's compare the decimals:

0.012 < 0.12

Combining both comparisons, the numbers in order from least to greatest are:

0.012 < 0.12 < 1.2 < 12

To order the given numbers from least to greatest, you need to compare their values.

Let's start by comparing the whole numbers first:
12 is the largest whole number in the list.

Now, let's compare the decimal numbers:
To compare decimal numbers, you can look at the digits after the decimal point. If the digits after the decimal point are the same, then you compare the digits before the decimal point.

In this case, the decimal numbers are: 1.2, 0.12, and 0.012.

Comparing the digits after the decimal point, we can see that:
0.012 < 0.12 < 1.2

Now, comparing the whole numbers and decimal numbers together, the numbers in order from least to greatest are:

0.012, 0.12, 1.2, 12