Look at the digit in the ones place. It is a 7. That will round up the number, so will increment the 6, giving 870 as the result.
1.54
63546 rounded to the nearest ten is 63550.
590
900
10 rounded to the nearest tens place is: 10. This is because the ones value is "0" so it does not round up.
It's already there.
870
It is: 0.6
It is 80.9
600
600
Zero
360
2.9
It is: 8
1.54
1530 1530