The answer is 60
60' To find the nearest ten to '57' , you move 7 places to '50', but only '3' places to '60'. So '60' is the nearest ten.
64 to the nearest tens place = 60
5,253 to the nearest tens place = 5,250
394 to the nearest tens place = 390
245 to the nearest tens place is 250
103 to the nearest tens place = 100
159.444 to the nearest tens place = 160
8,146 to the nearest tens place = 8,150
798 to the nearest tens place = 800
128.27 to the nearest tens place = 130
1678 to the nearest tens place = 1,680
542 to the nearest tens place = 540