You would think the answer was 2009-(-543) = 2009+543 = 2552 but, since there was no year 0, the answer is 2551.
from about 4.6 billion to 543 millions years ago
543 miles
543 miles.
543 mL is 0.543 mL.
543 yards = 1,629 feet.
1,776 years Before Christ or the Common Era came before 543 years Before Christ.
543 hours = 22.62500 daysrounded = 22.5 days
Thailand
543
543
54.3 of them.
543