You would round 1,985,027 as you would with any other number. You achieve this by looking at the digit in the place value directly to the right of the place value you're rounding too. In your case, you're trying to round to the closest hundred thousand.
In 1,985,000, the 9 is the starting of the hundred thousands place value. If the value of the number directly to the right of it (8) is more than five, you round up. If it's less than five - round down.
Here, the ten-thousands place is an 8, which is greater than five. So you round up. 1,985,027 becomes 2,000,000. Because the place value can be no higher than a 9. So you're actually rounding to the next million because the hundred thousands place value has exceeded the highest number in the real number line (0, 1, 2, 3, 4, 5, 6, 7, 8, & 9).
2,000,000
Nearest hundred: 82600,Nearest ten thousand: 80000.
It is 400,000 when rounded to the nearest hundred thousand
It is then 800,000 to the nearest hundred thousand
454000
It is already rounded to the nearest hundred thousand. You can't round a number to itself.
2,000,345 to the nearest hundred thousand is 2,000,000
3156770 = 3200000 to the nearest hundred thousand.
5416755 rounded to the nearest hundred thousand is 5400000.
2479015 rounded to the nearest hundred thousand is 2500000.
0.8394263 rounded to the nearest hundred-thousand = 0.83943
57,633,712 rounded to the nearest hundred thousand is 57,600,000.
Nearest hundred: 82600,Nearest ten thousand: 80000.
It is then 800,000 to the nearest hundred thousand
It is 400,000 when rounded to the nearest hundred thousand
6,329,451 rounded to the nearest hundred thousand is 6300000
146,389 rounded to the nearest hundred thousand is 100,000.
454000