![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
Rounding
![Placeholder: several colourful numbers](/themes/nrich/images/nrich_small_placeholder.png)
![Reasoned Rounding](/sites/default/files/styles/medium/public/thumbnails/content-id-10945-icon.jpg?itok=iFHBt_Nx)
problem
Reasoned Rounding
Four strategy dice games to consolidate pupils' understanding of rounding.
![Round the Dice Decimals 1](/sites/default/files/styles/medium/public/thumbnails/content-id-10438-icon.png?itok=eJOkIfXd)
problem
Round the Dice Decimals 1
Use two dice to generate two numbers with one decimal place. What happens when you round these numbers to the nearest whole number?
![Round the Three Dice](/sites/default/files/styles/medium/public/thumbnails/content-id-10436-icon.png?itok=RxNjWI24)
problem
Round the Three Dice
What happens when you round these three-digit numbers to the nearest 100?
![Round the Two Dice](/sites/default/files/styles/medium/public/thumbnails/content-id-10435-icon.png?itok=Ge508sBQ)
![Round the Dice Decimals 2](/sites/default/files/styles/medium/public/thumbnails/content-id-10428-icon.png?itok=HHqx05u0)
problem
Round the Dice Decimals 2
What happens when you round these numbers to the nearest whole number?
![Round the Four Dice](/sites/default/files/styles/medium/public/thumbnails/content-id-10426-icon.png?itok=84xTJDAX)
problem
Round the Four Dice
This activity involves rounding four-digit numbers to the nearest thousand.
![Antiques Roadshow](/sites/default/files/styles/medium/public/thumbnails/content-id-5704-icon.png?itok=JxkKfM7Q)
problem
Antiques Roadshow
Last year, on the television programme Antiques Roadshow... work out the approximate profit.
![Archimedes and numerical roots](/sites/default/files/styles/medium/public/thumbnails/content-02-08-six4-icon.gif?itok=yIJV220n)
problem
Archimedes and numerical roots
The problem is how did Archimedes calculate the lengths of the sides of the polygons which needed him to be able to calculate square roots?
![Archimedes and numerical roots](/sites/default/files/styles/medium/public/thumbnails/content-02-07-six4-icon.png?itok=7XKMGUXa)
problem
Archimedes and numerical roots
The problem is how did Archimedes calculate the lengths of the sides of the polygons which needed him to be able to calculate square roots?