Select the correct active \passive form of the given

Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.

If ‘÷’ means ‘-’, ‘-’ mean ‘+’, ‘+’ means ‘×’ and ‘×’ means ‘÷’, compute the value of the expression:

157 + 256 – 88 ÷ 8 × 4 = 117

If + denotes ÷, × denotes -, - denotes ×, and ÷ denotes +, what is the value of the following expression:

124 + 4 × 5 – 6 ÷ 6 + 3 = ?

Which one of the given mathematical operations will result in 291?

If ‘@’ means (+), ‘#’ means (-), ‘%’ means (×), and ‘&’ means (÷), then what is the value of the expression:

If ‘%’ means (÷), ‘&’ means (+), ‘$’ means (×), and ‘@’ means (-), then what is the value of the expression:

87 D 29 A 12 B 5 C 9 = ?