Question

If ‘+’ means ‘-’, ‘×’ means ‘÷’, ‘−’ means ‘+’, ‘÷’ means ‘×’, then find the value of 7 - 8 × 5 ÷ 6 + 4. [2 Marks]

Answer 1

Given: 7 - 8 × 5 ÷ 6 + 4

On substituting the meanings of operators we will have:
= 7 + 8 ÷ 5 × 6 - 4 [1 Mark]

= 7 + $\frac{48}{5}$ - 4

= $\frac{35+48-20}{5}$

= $\frac{63}{5}$

= 12$\frac{3}{5}$ [1 Mark]