The answer depends on the units used for 2.50. It should be obvious to anybody that, for example, the answers for 2.50 gallons and 2.50 pints will be very different!
3 L
It is: 3 litres.
Rounded to the nearest ones, it is 147 Rounded to the nearest ten, it is 150 Rounded to the nearest hundred, it is 100.
It is: 14,000,000 rounded to the nearest million
0
75,499,999 rounded to nearest millions is 75,000,000
250
254 rounded to the nearest then is 250.
464 centiliters rounded to the nearest liter is 4.7.
250 rounded the nearest hundreds place is 300.
250
250
250
103.468 rounded to the nearest liter is 103L
250
250
250
250