Order 0.709, 0.710, 0.79, and 0.079 from smallest to largest.

0.079, 0.709, 0.710, 0.79

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)

hope this helps