Answer
3925≈4000
11,243≈10,000
15,974≈20,000
17,916≈20,000
534,883≈500,000
2,788,000≈3,000,000
Work Step by Step
When using front end rounding you only look at the two left most digits. If the second digit 4 or less, leave the number in the first left most position as is and move zero to all other digits. If the second digit is 5 or greater, add one to the number in the first left most position and move zero to all the other digits.
3925≈4000
11,243≈10,000
15,974≈20,000
17,916≈20,000
534,883≈500,000
2,788,000≈3,000,000