Now,
48.85 > 48.8
& 48.85 < 48.9
So, we draw number line from 48.8 to 48.9
We divide the number line between 48.8 & 48.9 into 10 equal parts
Write the decimals in place value table
12.43, 684.95, 0.04, 0.83, 751.49
Hundred (100) 
Tens (10) 
Ones (1) 
Tenth (1/10) 
Hundredth (1/1 0 0) 

12.43 
0  1  2  4  3 
684.95 
6  8  4  9  5 
0.04 
0  0  0  0  4 
0.83 
0  0  0  8  3 
751.49 
7  5  1  4  9 