The answer is 3 meters.
Rounded to the nearest tens, 319 is 320. Rounded to the nearest hundred 319 is 300.
319
300
300
319
It is: 319
That rounds to zero.
4 metres
319
7.3km to the nearest meter is 7km
61426.1 to the nearest meter is 61426m
2.2 to the nearest meter is 2m