Estimate the value of by rounding each number to significant figure.

Answer and explanation

Correct answer: C. 200

  1. Step 1: Round: , , .
  2. Step 2: Calculate .
  3. Step 3: Dividing by doubles the number: .
Answer
200.
Why not the others: 50: This divides by instead of by . 20: This divides by , losing the decimal point in . 2000: This divides by , which is ten times too small a divisor.

Practise more Number.

Free questions with an explanation for every one, and full timed GCSE English and Maths Resits (Grade 4) mock tests.

All Number questionsTake a mock test

More Number questions