## Comparing and Ordering Decimals

## Set 1

## Set 2

## Set 3

Order the following decimals from smallest to greatest.

## Extension

During the Olympic 100m sprints the fastest time was 9.2131 seconds. The next fastest time was less than 2 hundredths of a second later than the fastest time and less than 4 tenths of a second faster than third place.

What are some possible times that the three places recorded (first, second and third).

What are some possible times that the three places recorded (first, second and third).

## Spiralling Decimals

Have you noticed that some very long numbers are very big whilst other very long numbers are small?

Can you think of an example of each?

Here's a game where you can test your skill at putting small numbers into the right order - it's not as easy as it sounds!

You need a partner, a copy of the game board drawn onto a white board, and two different coloured whiteboard markers.

Decide who goes first.

Take turns to choose a number from the grid and mark it on the spiral. Make sure you know where 0 and where 1 is!

Keep taking turns until one of you has marked three numbers next to each other.

Can you think of an example of each?

Here's a game where you can test your skill at putting small numbers into the right order - it's not as easy as it sounds!

**How to play**You need a partner, a copy of the game board drawn onto a white board, and two different coloured whiteboard markers.

Decide who goes first.

Take turns to choose a number from the grid and mark it on the spiral. Make sure you know where 0 and where 1 is!

Keep taking turns until one of you has marked three numbers next to each other.

**What next?**Can you work out a winning strategy?

Does it matter who goes first?

Does it matter which number you choose first?

Can you make up a different set of numbers which would make the game more challenging?

Perhaps you could have different start and end numbers for your spiral?

Send us your ideas so that we can share them with other children.