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Rounding to the nearest 10, 100 and 1000

Rounding to the nearest 10, 100 and 1000

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Explainer Video

Tutor: Alice

Summary

Rounding to the nearest 10, 100 and 1000

​​In a nutshell

Rounding numbers makes them much easier to work with. It also allows you to estimate answers to long, tricky calculations.


Rounding to the nearest 10

Definition

Rounding to the nearest ten means to round a number up or down to the nearest multiple of ten.


PROCEDURE

​​1.

Look at the digit in the ones column.

2. 

  • If the value is 0,1,2,30,1,2,30,1,2,3 or 444: round down to the nearest multiple of ten.​
  • If the value is 5,6,7,85,6,7,85,6,7,8 or 999​: round up to the nearest multiple of ten.


Example 1

Round 727272 to the nearest ten.


Look at the ones.

The digit in the ones column is 222.


Round down to the nearest multiple of ten.

72→70‾72\rightarrow\underline{70}72→70​​

​

Tip: Remember, a multiple of ten has a zero in the ones column. If you already have a zero in the ones, your number is already rounded!


Rounding to the nearest 100

​​Definition

Rounding to the nearest hundred means to round a number up or down to the nearest multiple of 100100100.


PROCEDURE

​​1.

Look at the digit in the tens column.

2.

  • If the value is 1,2,31,2,31,2,3 or 444: round down to the nearest multiple of 100100100.​​
  • If the value is 5,6,7,85,6,7,85,6,7,8 or 999​: round up to the nearest multiple of 100100100.


Example 2

Round 673673673 to the nearest hundred.


Look at the tens.

The digit in the tens column is 777.


Round up to the nearest multiple of 100100100​.

673→700‾673\rightarrow\underline{700}673→700​


Rounding to the nearest 1000

​​Definition

Rounding to the nearest thousand means to round a number up or down to the nearest multiple of 100010001000.


PROCEDURE

1.

Look at the digit in the hundreds column.

2.

  • If the value is 1,2,31,2,31,2,3 or 444: round down to the nearest multiple of 100010001000.​​
  • If the value is 5,6,7,85,6,7,85,6,7,8 or 999​: round up to the nearest multiple of 100010001000.


Example 3

Round 162916291629 to the nearest thousand.


Look at the hundreds.

The digit in the hundreds column is 666.


Round up to the nearest multiple of 100010001000​.

1629→2000‾1629\rightarrow\underline{2000}1629→2000​

​​


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Learn with Basics

Learn the basics with theory units and practise what you learned with exercise sets!
Length:
Place value: Four-digit numbers

Unit 1

Place value: Four-digit numbers

Numbers to 1000

Unit 2

Numbers to 1000

Jump Ahead

Score 80% to jump directly to the final unit.

Optional

Rounding to the nearest 10, 100 and 1000

Unit 3

Rounding to the nearest 10, 100 and 1000

Final Test

Test reviewing all units to claim a reward planet.

Create an account to complete the exercises

FAQs - Frequently Asked Questions

How do I round to the nearest 1000?

To round to the nearest 1000: 1. Look at the digit in the hundreds column. 2. - If the value is 1, 2, 3 or 4: round down to the nearest multiple of 1000.​ - If the value is 5, 6, 7, 8 or 9​: round up to the nearest multiple of 1000.

How do I round to the nearest 100?

To round to the nearest 100: 1. Look at the digit in the tens column. 2. - If the value is 1, 2, 3 or 4: round down to the nearest multiple of one hundred.​ - If the value is 5, 6, 7, 8 or 9​: round up to the nearest multiple of one hundred.

How do I round to the nearest 10?

To round to the nearest 10: 1. Look at the digit in the ones column. 2. - If the value is 1, 2, 3 or 4: round down to the nearest multiple of ten.​ - If the value is 5, 6, 7, 8 or 9​: round up to the nearest multiple of ten.

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