Final answer:
To put these numbers in order from least to greatest, consider the absolute values of the numbers.
Step-by-step explanation:
To put these numbers in order from least to greatest, we need to look at the absolute values of the numbers. Absolute value refers to the distance of a number from zero on a number line.
So, the order from least to greatest is: |3|, |2|, |-4|, |-1|, 0, 1, -5, -7, -8, -10, -11, -13, 5, 7, 8, 10, 11, 12, 13, 15.