SOLUTION STEPS (Set 7):
  1. For 1 decimal place, look at the digit in the hundredths place (second digit after the decimal point).
  2. 0.25 has hundredths digit 5. When this digit is 5 or more, round the tenths digit UP.
  3. Tenths digit 2 rounds up to 3. So 0.25 rounded to 1 decimal place is 0.3.