4,651 rounded to the nearsest thousands is 5,000
303 to the nearest 10 = 300
7.6
13.49
If that's 2398 liters, it's already rounded to the nearest liter. If it's some other unit of measure, you should indicate what it is.
0.1
It is 958
1560
600
117 rounded to the nearest 100 = 100
2400
987 rounded to the nearest 100 is 1000.