Rounding Ten
Round the numbers to the nearest whole number or the given power of ten.
Rounding DP
A self marking exercise requiring students to round numbers to a given number of decimal places.
Rounding SF
A self marking exercise requiring students to round numbers to a given number of significant figures.
Rounding Snap
If the last card put down equals the previous card to the nearest whole number then all players race to shout SNAP!
Rough Answers
An exercise on rounding values in a calculation to find an approximate estimate of the answer.
Upper and Lower Bounds
Determine the upper and lower bounds when rounding or truncating quantities used in calculations.
This is the main Transum help video on Rounding.
Rounding Video
A reminder of how to round numbers to significant figures, decimal places and to the nearest power of ten.
Upper and Lower Bounds Video
A reminder of how to find the limits of accuracy of rounded values.
Decimals Line
A number line showing tenths and hundredths with draggable arrows. This is a visual aid designed to be projected onto a whiteboard for whole class exposition
Rounding Snap
If the last card put down equals the previous card to the nearest whole number then all players race to shout SNAP!
Absolutely Everyone
A choice of questions about the current world population which is constantly changing.
Moon Lengths
Estimate the distances shown on this photograph of the moon's surface.
Pi Day
March 14th is Pi Day. The third month and the 14th day relates to 3.14 which is pi to three significant figures. How many figures of pi can you memorise?
Rounding 1dp
Round off the given numbers to 1 decimal place then add the answers together.
Rounding 2dp
Round off the given numbers to 2 decimal places then add the answers together.
Rounding Whole
Round off the given numbers to the nearest whole number then add the answers together.
14 items are currently in this category.
Teachers might find the complete Rounding Topic List useful.
The objective of rounding is often to get a number that is easier to use, at the cost of making it less precise. This approximation is very important in dealing with answers to mathematical problems and making them relevant to the real world. Rounding to a given number of decimal places or significant figures is required of pupils.
See also the "Approximating" Starters.
Once the principles of rounding have been understood, a fun way to practise the skills is to play "Rounding Snap".
