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I can help you solve the math problems shown in your image. Let's go through them one by one:

1. **\( 6 + (-4) = \)**
   - Adding a negative number is the same as subtraction:  
   \( 6 - 4 = 2 \)

2. **\( (-1) + (-9) = \)**
   - Adding two negative numbers:  
   \( -1 + (-9) = -10 \)

3. **\( (-7) - (-8) = \)**
   - Subtracting a negative is the same as adding:  
   \( -7 + 8 = 1 \)

4. **\( \frac{-2}{3} - \frac{3}{4} = \)**
   - First, find a common denominator (12):  
     \[ \frac{-2}{3} = \frac{-8}{12}, \quad \frac{3}{4} = \frac{9}{12} \]  
     Now subtract:  
     \[ \frac{-8}{12} - \frac{9}{12} = \frac{-17}{12} \]
     So, \( \frac{-2}{3} - \frac{3}{4} = \frac{-17}{12} \).

5. **\( 6, 4, .1 (-6, 2) = \)**
   - The operation is unclear due to the formatting. Could you clarify what is meant here? It seems to be missing or miswritten.

6. **\( (-28) \div (-4) = \)**
   - Dividing two negative numbers gives a positive result:  
   \( -28 \div -4 = 7 \)

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Would you like more details on any of these? Here are 5 related questions you could explore:

1. How do you add and subtract negative numbers?
2. What is the rule for dividing negative numbers?
3. How can you simplify fractions with different denominators?
4. Why does subtracting a negative become addition?
5. Can you further simplify improper fractions like \( \frac{-17}{12} \)?

**Tip:** When subtracting fractions, always find a common denominator first to make the operation easier!

6 + (-4) = ?, (-1) + (-9) = ?, (-7) - (-8) = ?, (-2/3) - (3/4) = ?, 6,4,.1(-6,2) = ?, (-28) ÷ (-4) = ?

This page provides step-by-step solutions to mathematical expressions involving the addition and subtraction of negative numbers, fraction operations, and division of negative numbers. The problems cover key concepts such as subtracting negative values and finding a common denominator for fractions.

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