You will have to look at the placement of each digit.
In this case, after the decimal point: tenths is the largest (the number directly to the right of the decimal point) hundredths is next (the number directly to the right of the tenths place) thousands is the smallest (in this case, next to the hundreds place)
0.079 - this is the smallest because there is a zero in the "tenths" place after the decimal. 0.709- more than 0.079 because the first place after the decimal is filled. 0.710- This is more than 0.709 because the "hundredths" place out-ranks the "thousandths" place 0.79- The largest of these numbers because it has the highest numbers in the first two places after the decimal.
