3.91 rounded off to one decimal place = 3.9
there are no decimals to round off in 96.
37.7
61.6 is the answer
22.0
1.9
6.5km
7.2
69.6
99.99 rounded off to one decimal place = 100.0
6.45 to one
By adding simple logic you can round off to single digit. In any value you add 0.05 and pick only one digit after the decimal and the result will be the value after rounding off in one decimal place.