Mathematics 4024 · O Level · The four operations

The four operations — practice question

(a)[1]

Add a single pair of brackets so that the calculation becomes correct: $4.2-3\times5+1.2=7.2$.

(b)[1]

Add one pair of brackets to make the calculation correct: $5-3^2-\sqrt[3]{64}+2=-10$.

Worked solution & mark scheme

This 2-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Therefore, $(4.2-3)\times5+1.2=7.2$.” …