For number
The first digit after decimal point is tenth.
46.8 = 4 × 10 + 6 × 1 + 8 × 1/10
Writing in a place value table
Ten (10)  Ones (1)  Tenth (1/10) 
4  6  8 
Write the decimals in place value table
57.5, 8.3, 504.9, 2.5, 0.8
Hundred (100) 
Tens (10) 
Ones (1) 
Tenth (1/10) 

57.5  0  5  7  5 
8.3  0  0  8  3 
504.9  5  0  4  9 
2.5  0  0  2  5 
0.8  0  0  0  8 