We have to arrange them from the smallest to the greatest number. We arrange them as follows (using the idea of place value and comparing their digits at different places); 2.0226, 2.023, 2.2, 20.42, 22.1 (Note: Using the < sign, these numbers can also be written as 2.0226 < 2.023 < 2.2 < 20.42 < 22.1.)