Answer and explanation

Correct answer: C.

  1. Step 1: Brackets first: and .
  2. Step 2: .
Answer
.
Why not the others: is what you get if you leave the outside the bracket. is what you get if you add the last number. is what you get if you add instead of multiplying.

Practise more Number, Fractions and Ratio.

Free questions with an explanation for every one, and full timed GCE O/L Mathematics (Sri Lanka) mock tests.