100
All numbers can be rounded to the nearest ten.
There are infinitely many such numbers.
999 of them.
70
0
All numbers can be rounded to the nearest ten.
88500
530
An infinite number.
The numbers 250-259 can be rounded to 300. Also 301-349 can be rounded down to 300. This works if you are rounding by the nearest hundreds place.
1000
There are infinitely many such numbers.
Well, honey, any number that ends in 0 can be rounded to the nearest 500. So, technically, there are infinite numbers that can be rounded by 500. But if you want a specific range, let's say -500 to 500, then that's 2001 numbers. Hope that clears things up for ya!
999 of them.
70
70
33,500,000 to 34,499,999