To solve the expression \(-\dfrac{1}{2} - \dfrac{3}{5}\), we need to find a common denominator before performing the subtraction.

1. The denominators are 2 and 5. The least common denominator (LCD) is 10.
2. Rewrite each fraction with the LCD:
   \[
   -\dfrac{1}{2} = -\dfrac{5}{10}
   \]
   \[
   -\dfrac{3}{5} = -\dfrac{6}{10}
   \]
3. Now subtract the two fractions:
   \[
   -\dfrac{5}{10} - \dfrac{6}{10} = -\dfrac{5 + 6}{10} = -\dfrac{11}{10}
   \]

So, the final result is \(-\dfrac{11}{10}\).

Would you like more details or have any questions? 

Here are five related questions you might find interesting:
1. How do you find the least common denominator for two fractions?
2. How can you convert an improper fraction to a mixed number?
3. What is the process for adding fractions with different denominators?
4. How do you handle subtraction of fractions with the same denominator?
5. How do you simplify a fraction?

**Tip:** When working with fractions, always make sure to find a common denominator before adding or subtracting them.

Learn how to subtract fractions -1/2 and -3/5 with a step-by-step solution. This problem involves finding a common denominator and performing subtraction of negative fractions. Suitable for Grades 6-8.

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