Rounding to decimal places and significant figures

Sample Rounding to decimal places and significant figures questions

A few of the 35 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 11 markGrade 2-3
   Round $18.597$ to 1 decimal place.
   Show the worked solution

   Look at the digit after the 1st decimal place to decide whether to round up or keep the same: $18.597$

   Rounded to 1 decimal place: $18.6$
2. Question 23 marksGrade 2-3
   A recipe requires

What are the common mistakes in Rounding to decimal places and significant figures?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Rounds to the wrong number of decimal places

  For part (a), rounded to a different precision than asked (gave the answer for part (b) instead).

• Counts leading zeros as significant figures

  Counted the zeros immediately after the decimal point as significant figures, but leading zeros are never significant - only count from the first non-zero digit

• Drops the placeholder zeros needed to keep a number's place value correct after rounding to significant figures

  Kept only the first 1 digits without replacing the remaining digits with zeros, which changes the number's size/place value

Quick answers about Rounding to decimal places and significant figures

How many Rounding to decimal places and significant figures practice questions are there?

There are 35 self-marking GCSE and IGCSE Maths questions on Rounding to decimal places and significant figures, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Core and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Rounding to decimal places and significant figures?

No. You can start practising Rounding to decimal places and significant figures straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.