850
To round 847 to the nearest 10, we look at the digit in the tens place, which is 4. Since 4 is less than 5, we round down. Therefore, 847 rounded to the nearest 10 is 840.
58 to the nearest tens is 60.
847 to the nearest hundred is 800. Since 47 is less than half of 100, you round down.
800
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.