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Edexcel IGCSE Math A Higher 1.8 D Estimating Numerical Calculations Questions

Practise estimation questions by rounding every number first and using the simplified calculation to judge whether an answer is sensible.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Higher

Exam points

  • Round each number to 1 significant figure before estimating products, divisions or roots.
  • Compare an approximate result with a calculator answer to decide whether it is sensible.

Edexcel IGCSE Math A Higher 1.8 D Estimating Numerical Calculations Questions question 1

[Maximum number: 2]

The weight of a cake is 2.75 kg , correct to 2 decimal places.

By rounding each number to one significant figure, work out a suitable estimate to show that her answer is not sensible.
Show your working clearly.

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