Answer:To round numbers to the nearest thousands, we look at the hundreds digit. If the hundreds digit is 5 or greater, we round up; if it is less than 5, we round down. Applying this rule:- 1,284 rounds to 1,000 because the hundreds digit (2) is less than 5.- 3,038 rounds to 3,000 because the hundreds digit (0) is less than 5.- 4,551 rounds to 5,000 because the hundreds digit (5) is equal to or greater than 5.- 6,305 rounds to 6,000 because the hundreds digit (3) is less than 5.- 8,766 rounds to 9,000 because the hundreds digit (7) is greater than or equal to 5.Step-by-step explanation: