Answer:
Hundred thousands: 1
Ten thousands: 7
Explanation:
The first digit from the left is the unit digit (4).
The second digit from the left is the tens digit (8).
The third digit from the left is the hundreds digit (3).
The fourth digit from the left is the thousands digit (5).
The fifth digit from the left is the ten thousands digit (7).
The sixth digit from the left is the hundred thousands digit (1).