1. Use the modeling method to subtract. What is the result of $1\frac{1}{2} - \frac{3}{5}$? Express your answer as a fraction. The answer is ___.
2. To model the subtraction problem $1\frac{1}{5} - \frac{1}{2}$, what is the least number of equal parts you should partition each rectangle into?
3. A painter has $1\frac{1}{6}$ gallons of paint. He uses $\frac{1}{4}$ of a gallon for a project. How much paint is left? The answer is ___ gallons.
4. When modeling $1\frac{2}{5} - \frac{1}{2}$, the mixed number $1\frac{2}{5}$ is represented as an improper fraction using the common denominator. What is this equivalent improper fraction?
5. Calculate the difference: $1\frac{3}{4} - \frac{5}{6}$. Express your answer as a fraction. The answer is ___.
6. To solve $1\frac{1}{4} - \frac{1}{3}$ with a rectangular model, you first show $1\frac{3}{12}$ and then cross out some parts. How many twelfths should you cross out?
7. A path is $1\frac{2}{3}$ miles long. Sarah has already walked $\frac{7}{9}$ of a mile. How much farther does she have to walk? The answer is ___ miles.
8. A recipe needs $1\frac{1}{3}$ cups of flour, but you only have $\frac{3}{4}$ of a cup. How much more flour do you need?
9. Calculate the difference: $1\frac{1}{4} - \frac{1}{2} = \_\_\_$.
10. To solve $1\frac{1}{5} - \frac{1}{3}$ using a rectangular model, what is the least number of equal parts you should partition each rectangle into?