1. The problem asks to round the number 3.281 to 1 decimal place (d.p.). 2. Rounding to 1 decimal place means keeping only one digit after the decimal point. 3. The number is 3.281. The first decimal digit is 2, and the second decimal digit is 8. 4. According to rounding rules, if the digit after the place to round to is 5 or greater, we round up the last kept digit. 5. Here, the second decimal digit is 8, which is greater than 5, so we round up the first decimal digit 2 to 3. 6. Therefore, 3.281 rounded to 1 decimal place is 3.3.