Well, darling, 2298 rounded to the nearest 1000 is simply 2000. It's like trying to squeeze into a pair of jeans that are a size too small - just round up and move on with your fabulous self.
1000
1000
1000
must be 1000
123000
123000
123000
It is 123000.
1048 to nearest hundred is '1000'. NB Remember 1000 is ten hundreds. Remember too, you move 48 places back to 1000, and 52 places to 1100.
736 to the nearest 1000, is 1000.
1000
1000
1000
1000
1000
1000