Explanation:

- Let's evaluate what happens when you interchange the signs for each option:

1. Interchanging − and ×:

- Original equation: 35 + 7 × 12 - 6 ÷ 2

- Modified equation: 35 + 7 - 12 × 6 ÷ 2

- Simplifying: 35 + 7 - 72 ÷ 2 = 35 + 7 - 36 = 6

- This achieves the result on the right-hand side.

2. Interchanging − and ÷:

- Modified equation: 35 + 7 × 12 ÷ 6 - 2

- This results in: 35 + 14 - 2 = 47

- Doesn’t match 6.

3. Interchanging + and ×:

- Modified equation: 35 × 7 + 12 - 6 ÷ 2

- Results in: 245 + 12 - 3 = 254

- Doesn’t match 6.

4. Interchanging × and ÷:

- Modified equation: 35 + 7 ÷ 12 - 6 × 2

- Results in: 35 + 0.5833 - 12 = 23.5833

- Doesn’t match 6.

- Correct Answer: Option 1 - Interchange − and ×