Answer
Ten: 84,640
Hundred: 84,600
Thousand: 85,000
Work Step by Step
To round to the nearest ten, we look at the ones place, which is 9 so we round up to the next biggest ten: 84,640.
To round to the nearest hundred we look at the tens place, which is 3 so we round down to the same hundred: 84,600.
To round to the nearest thousand we look at the hundreds place, which is 6 so we round up to the next biggest thousand: 85,000.