Answer
Ten-thousand: 39,840,000; Hundred-thousand: 39,800,000; Million: 40,000,000
Work Step by Step
To round to the nearest ten-thousand, we see that the digit to the right of the ten-thousands place is 6, so we round up to the next biggest ten-thousands value (38,840,000).
To round to the nearest hundred-thousand, we see that the digit to the right of the hundred-thousands place is 3, so we round down and keep the same value (39,836,000).
To round to the nearest million, we see that the digit to the right of the millions place is 8, so we round up to the next highest million (40,000,000).
