Explanation:

- To solve for 35 by interchanging signs in the expression \(13 + 91 - 3 ÷ 529 × 23\):

- Option 1: + and -

- Swap + and -. The expression becomes: \(13 - 91 + 3 ÷ 529 × 23\).

- This doesn’t yield 35.

- Option 2: × and ÷

- Swap × and ÷. The expression becomes: \(13 + 91 - 3 × 529 ÷ 23\).

- Calculate:

- \(3 × 529 = 1587\)

- \(1587 ÷ 23 \approx 69\)

- \(13 + 91 - 69 = 35\)

- This gives the correct result.

- Option 3: × and +

- Swap × and +. The expression becomes: \(13 × 91 - 3 ÷ 529 + 23\).

- This doesn’t yield 35.

- Option 4: - and ÷

- Swap - and ÷. The expression becomes: \(13 + 91 ÷ 3 - 529 × 23\).

- This doesn’t yield 35.