To find the difference between \( 10.06 \) and \( 1.90 \):
\[ 10.06 - 1.90 \]
To perform the subtraction, we can align the numbers by their decimal points:
\[ \begin{array}{r} 10.06 \
- 1.90 \ \hline \end{array} \]
Now, perform the subtraction starting from the right:
- In the hundredths place: \( 6 - 0 = 6 \)
- In the tenths place: \( 0 - 9 \): since we can't subtract 9 from 0, we need to borrow from the units place. This makes it \( 10 - 9 = 1 \) (the tenths place after borrowing becomes \( 0 \)).
- In the units place: After borrowing, we have \( 9 - 1 = 8 \).
Putting it all together, we have:
\[ \begin{array}{r} 10.06 \
- 1.90 \ \hline 8.16 \ \end{array} \]
Thus, the difference is:
\[ \boxed{8.16} \]