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
10 rounded to the nearest tens place is: 10. This is because the ones value is "0" so it does not round up.
428 round to the nearest ten is 430.
It's already there.
870
It is: 0.6
Zero
It is 80.9
600
600
360
2.9
It is: 8
1.54
1530 1530