There are 39 tens in 390. 390/10 = 39
3900/10=390
39 tens is 390.
390
392 to the nearest tens = 390
394 to the nearest tens place = 390
391 rounded to the nearest tens place is 390
390
390
386 to the nearest tens place is 390
It is already at the nearest ten'. There are '39' tens. 39 x 10 = 390 .
399 rounded to the nearest hundred is 400. 399 rounded to the nearest tens is also 400.