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Place value and rounding

Place value and rounding for ESOL Maths: what it means, how to set the working out, and the questions it is asked in.
  • ESOL
  • Maths
  • Spec P9
  • 6 min read
  • 6 revision boxes

Introduction

2 boxes
4 min read

What is place value and rounding?

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Transcript

A short spoken summary of place value and rounding and where it is used.

A spoken walk-through of place value and rounding before you read the notes.
Practise the routine version until it is automatic, then move to the multi-step questions.
The layout below is the one the mark scheme expects.

Diagram showing place value and rounding laid out step by step

The same idea drawn out, so the method is visible.
Worth knowing: ≈160\approx 160.
4 rows

The place value and rounding reference table

Sketch the shape even when the question does not ask for one — it makes the next step obvious.
The layout below is the one the mark scheme expects.

Diagram showing place value and rounding laid out step by step

The same idea drawn out, so the method is visible.
Worth knowing: x2+5x+6=0x^2 + 5x + 6 = 0.
Term
Meaning
Example
Row 1 column 1
Row 1 column 2
≈160\approx 160
Row 2 column 1
Row 2 column 2
49=7\sqrt{49} = 7
Row 3 column 1
Row 3 column 2
a2+b2=c2a^2 + b^2 = c^2
Row 4 column 1
Row 4 column 2
34×25\frac{3}{4} \times \frac{2}{5}

Learning

2 boxes
3 steps

How to work with place value and rounding

This idea appears again in the higher-mark questions, so it is worth over-learning.
  1. Read the question and write down what is being asked for.
  2. Set out the working for place value and rounding in the order the method gives.
  3. Substitute the values and simplify.
Start from the definition and substitute the numbers the question gives you.
Simplify one line at a time: 49=7\sqrt{49} = 7.
Answer: 34×25\frac{3}{4} \times \frac{2}{5}
2 rules

Key facts: Place value and rounding

The examiner marks the working, so a correct answer with no method still drops marks.
The layout below is the one the mark scheme expects.

Diagram showing place value and rounding laid out step by step

The same idea drawn out, so the method is visible.

  • Rule 1

    How place value and rounding behaves in the 1st of the cases the specification names.
    ×10\times 10 moves every digit one column left

  • Rule 2

    How place value and rounding behaves in the 2nd of the cases the specification names.
    49=7\sqrt{49} = 7

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Examples

2 boxes
2 marks · worked

Worked example: place value and rounding

The examiner marks the working, so a correct answer with no method still drops marks.
4 marks · worked

Practice question 6: ≈160\approx 160

Check the answer against an estimate before you move on, so a place-value slip is caught here.

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Common questions

How many marks is place value and rounding usually worth?
Between one and four, depending on how many steps the question asks for.
Is this on the ESOL Maths paper?
Yes — it sits in the Number strand.