508 to the nearest tens = 510
510
20 is already rounded to the nearest tens.
725 to the nearest tens = 730
3,545 to the nearest tens is 3,550
56,999 to the nearest tens is 57,000
508 to the nearest ten is 510
58 to the nearest tens is 60.
429 to the nearest tens = 430
82 to the nearest tens = 80
145 to the nearest tens = 150
248 to the nearest tens is 250
4,368,498 to the nearest tens = 4,368,500
392 to the nearest tens = 390
3,589.996 to the nearest tens is 3,590
85 to the nearest tens is 90.
46,434,482 to the nearest tens = 46,434,480
51 to the nearest tens is 50.