5499999
14,000
1549
10.43
14999
Ten integers can be rounded off to 280. An infinite number of numbers can be rounded off to 280.
999 of them.
u just make the number shorter e.g. 1.7 is rounded off to 2
55
Since numbers equal to or greater than 5 are rounded up, and numbers equal to or less than 4 are rounded down, the largest 4-digit number that can be rounded off to 3000 would be 3004.
15 to 24
35 to 44
245 to 254
25549
Infinitely many.
45 to 54
3 499