https://r2.erweima.ai/mathbot/image/1719286580646xya4l61z.jpg

判断一下上面图片中哪些题做对了，没做的能给出答案吗

From the extracted text, I can see that some of the mathematical problems might not have been fully captured accurately due to OCR limitations. I will rely on the visual interpretation of the image to provide the answers and verify the solutions.

### Problems and Verification:

#### 1. \( 92 \div 30 \)
- Calculation:
  \[
  92 \div 30 = 3 \quad \text{remainder} \quad 2
  \]
- Verification: Correct

#### 2. \( 178 \div 30 \)
- Calculation:
  \[
  178 \div 30 = 5 \quad \text{remainder} \quad 28
  \]
- Verification: Correct

#### Unsolved Problems:
Here are the unsolved problems with their answers:

1. \( \frac{10}{30} \)
   - Answer: \( \frac{10}{30} = \frac{1}{3} \)

2. \( \frac{40}{85} \)
   - Answer: \( \frac{40}{85} = \frac{8}{17} \)

3. \( \frac{20}{40} \)
   - Answer: \( \frac{20}{40} = \frac{1}{2} \)

4. \( \frac{10}{36} \)
   - Answer: \( \frac{10}{36} = \frac{5}{18} \)

5. \( \frac{30}{64} \)
   - Answer: \( \frac{30}{64} = \frac{15}{32} \)

6. \( \frac{20}{49} \)
   - Answer: \( \frac{20}{49} = \frac{20}{49} \) (already in simplest form)

7. \( \frac{20}{140} \)
   - Answer: \( \frac{20}{140} = \frac{1}{7} \)

8. \( \frac{20}{138} \)
   - Answer: \( \frac{20}{138} = \frac{10}{69} \)

9. \( \frac{40}{325} \)
   - Answer: \( \frac{40}{325} = \frac{8}{65} = \frac{8}{65} \)

10. \( \frac{20}{143} \)
    - Answer: \( \frac{20}{143} = \frac{20}{143} \) (already in simplest form)

11. \( \frac{40}{316} \)
    - Answer: \( \frac{40}{316} = \frac{10}{79} \)

Would you like detailed steps for any of these calculations? Do you have any specific questions?

Here are 5 more questions you might consider:
1. How do you convert fractions to simplest form?
2. What is the method to find the remainder in division?
3. How to check if a fraction is in simplest form?
4. What are some real-world applications of fractions?
5. Can you explain how to divide fractions?

**Tip:** When simplifying fractions, always find the greatest common divisor (GCD) of the numerator and the denominator to ensure the fraction is in its simplest form.

Explore practice problems involving division and fraction simplification. Verify division calculations and learn how to simplify fractions step-by-step. Suitable for students in Grades 6-8.

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