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The image you uploaded contains a series of fraction-related mathematical problems. I will solve each problem step by step.

### Left Page:
1. \( \frac{7}{9} - \frac{2}{9} \)
   - **Solution**: Since the denominators are the same, subtract the numerators:
   \[
   \frac{7-2}{9} = \frac{5}{9}
   \]

2. \( \frac{4}{7} + \frac{1}{7} \)
   - **Solution**: Again, subtract the numerators since the denominators are the same:
   \[
   \frac{4+1}{7} = \frac{5}{7}
   \]

3. \( \frac{8}{13} - \frac{5}{13} \)
   - **Solution**: Same denominators, subtract the numerators:
   \[
   \frac{8-5}{13} = \frac{3}{13}
   \]

4. \( \frac{10}{11} - \frac{6}{11} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{10-6}{11} = \frac{4}{11}
   \]

5. \( \frac{8}{10} - \frac{3}{10} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{8-3}{10} = \frac{5}{10} = \frac{1}{2}
   \]

6. \( \frac{3}{5} + \frac{1}{5} \)
   - **Solution**: Add the numerators:
   \[
   \frac{3+1}{5} = \frac{4}{5}
   \]

7. \( \frac{6}{7} + \frac{2}{7} \)
   - **Solution**: Add the numerators:
   \[
   \frac{6+2}{7} = \frac{8}{7} = 1 \frac{1}{7}
   \]

8. \( \frac{7}{10} - \frac{4}{10} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{7-4}{10} = \frac{3}{10}
   \]

9. \( \frac{6}{9} - \frac{4}{9} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{6-4}{9} = \frac{2}{9}
   \]

10. \( \frac{8}{21} - \frac{6}{21} \)
    - **Solution**: Subtract the numerators:
    \[
    \frac{8-6}{21} = \frac{2}{21}
    \]

### Right Page:
1. \( \frac{7}{15} - \frac{4}{15} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{7-4}{15} = \frac{3}{15} = \frac{1}{5}
   \]

2. \( \frac{9}{12} + \frac{3}{12} \)
   - **Solution**: Add the numerators:
   \[
   \frac{9+3}{12} = \frac{12}{12} = 1
   \]

3. \( \frac{8}{13} - \frac{5}{13} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{8-5}{13} = \frac{3}{13}
   \]

4. \( \frac{9}{13} + \frac{2}{13} \)
   - **Solution**: Add the numerators:
   \[
   \frac{9+2}{13} = \frac{11}{13}
   \]

5. \( \frac{7}{9} - \frac{1}{9} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{7-1}{9} = \frac{6}{9} = \frac{2}{3}
   \]

6. \( \frac{8}{15} - \frac{7}{15} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{8-7}{15} = \frac{1}{15}
   \]

7. \( \frac{8}{11} - \frac{3}{11} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{8-3}{11} = \frac{5}{11}
   \]

8. \( \frac{7}{10} - \frac{3}{10} \)
   - **Solution**: Subtract the numerators:
   \[
   \frac{7-3}{10} = \frac{4}{10} = \frac{2}{5}
   \]

Would you like further details or explanations for any specific problem?

### Relative Questions:
1. What is the process for adding or subtracting fractions with different denominators?
2. How can you simplify a fraction after performing addition or subtraction?
3. Why is it important to have the same denominator when adding or subtracting fractions?
4. Can you explain how to convert an improper fraction to a mixed number?
5. What are the steps for solving word problems involving fraction operations?

### Tip:
Always check if fractions can be simplified after performing addition or subtraction to ensure your final answer is in its simplest form.

Explore step-by-step solutions to fraction problems involving addition and subtraction. This page covers multiple examples of fraction operations, including simplification and common denominators. Suitable for students in Grades 6-8.

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