751684 rounded to the nearest 100000 is 800000. Look at the digit to the right of the hundred thousands, the ten thousands. When rounding anything less than five you round down. When rounding anything five or more you round up. The ten thousands digit is 5 so you round up, making the answer 800000.
127891 rounded to the nearest 100000 is 100000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
127891 rounded to the nearest 100000 is 100000.
2682917 rounded to the nearest 100000 is 2700000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
It is 100000.
It would be 100000. Rounded to the nearest ten thousand is 130000
100000