Respuesta :

15.
Ones: 1
Thousandths: 0
Tens: 0
16.
Thousands: 0
Tenths: 8
Ones: 0
Thousandths: 2
Tens: 6
17.
Thousands: 6
Tenths: 0
Hundreds: 1
Ones: 1
Hundredths: 5
Tens: 4

Hope that helped, Pham. ;)