Ordering decimals

Home learning focus

Learn how to order decimals by size.

This lesson includes:

  • one slideshow
  • three interactive activities

Created in partnership with Twinkl

Learn

To order decimal numbers, you need to compare the place value of the digits in each number.

First you look at the digits in the largest place value position. If they are the same, look at the digits in the next place value position to the right, until you find a difference.

Which is smaller, 3.4 or 3.6?

The ones digit, 3, is the same in both numbers, so you need to look at the number in the tenths position to work out which number is smaller.

4 is smaller than 6, so 3.4 is smaller than 3.6.

Have a look at the slideshow below to see another example. This time four numbers need to be put in order from smallest to largest.

these four numbers need to be put in order, starting with the smallest

Order these decimals from largest to smallest: 8.6, 8.06, 8.53 and 8.36

1 of 6

Practise

Activity 1

Have a go yourself - try this activity from KS2 Maths.

Order the decimals from smallest to largest.

Activity 2

Monster line-up

Print out the worksheet and cut out the monsters or draw your own monsters on squares of paper. Then complete the questions and add your monsters to the number line.

Monster line-up

Click here for the answer sheet

Activity 3

Spot the mistake

Look at the worksheet below and write your answers on paper. Write full sentences for questions 1 and 3.

Spot the mistake

Click here for the answer sheet

There's more to learn

Have a look at these other resources around the BBC and the web.

More lessons for Year 4 and P5
KS2 Maths
7 - 11 Maths
Primary games
Newsround
The Worst Witch: The Enchanted Stones
Radio 1's Movie Mixtapes