cirle the digit in the tens place.use this digit to round up or down to the nearest ten
25
42
53
136
422
517
69
81
634
758
5-9 -- round up
0-4 -- round down
422 ~~> 420
758 ~~> 760
You try the rest.
25
42
53
136
422
517
69
81
634
758
0-4 -- round down
422 ~~> 420
758 ~~> 760
You try the rest.