Viết số hoặc PS thích hợp

Dưới đây là đáp án cho từng câu hỏi trong bài toán:

### Câu 1:
1. \(3 \, \text{m}^2 + 2 \, \text{dm}^2 = 3.02 \, \text{m}^2\)
2. \(3 \, \text{m}^2 + 45 \, \text{cm}^2 = 3.0045 \, \text{m}^2\)
3. \(\frac{3}{5} \, \text{ha} = 0.6 \, \text{m}^2\)
4. \(\frac{1}{2} \, \text{m}^2 = 0.01 \, \text{dm}^2\)
5. \(10 \, \text{km}^2 = 1,000,000 \, \text{hm}^2\)
6. \(\frac{1}{10} \, \text{hm}^2 = 100 \, \text{m}^2\)
7. \(38 \, \text{m}^2 + 25 \, \text{dm}^2 = 38.025 \, \text{m}^2\)
8. \(15 \, \text{dm}^2 + 9 \, \text{cm}^2 = 15.0009 \, \text{m}^2\)
9. \(10 \, \text{cm}^2 + 6 \, \text{mm}^2 = 10.006 \, \text{m}^2\)

### Câu 2:
1. \(8 \, \text{dam}^2 + 87 \, \text{m}^2 = 8.87 \, \text{dam}^2\)
2. \(3 \, \text{km}^2 + 8 \, \text{dam}^2 = 3.08 \, \text{km}^2\)
3. \(15 \, \text{cm}^2 + 9 \, \text{m}^2 = 9.0015 \, \text{m}^2\)
4. \(9 \, \text{hm}^2 + 28 \, \text{hm}^2 = 37 \, \text{hm}^2\)
5. \(10 \, \text{dam}^2 + 14 \, \text{m}^2 = 10.014 \, \text{dam}^2\)
6. \(5 \, \text{dm}^2 + 19 \, \text{cm}^2 = 5.019 \, \text{dm}^2\)
7. \(15 \, \text{hm}^2 + 74 \, \text{dam}^2 = 15.74 \, \text{hm}^2\)

Hy vọng đáp án này hữu ích cho bạn!