Transum Maths Software

Approximation

There are 366 different Starters of The Day, many to choose from. You will find in the left column below some starters on the topic of Approximation. In the right column below are links to related online activities, videos and teacher resources.

A lesson starter does not have to be on the same topic as the main part of the lesson or the topic of the previous lesson. It is often very useful to revise or explore other concepts by using a starter based on a totally different area of Mathematics.

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Approximation Starters:

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.

 

Small images of these Starters | | |  Complete Index of Starters

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Polybragging

If you have ever played a card game called Top Trumps you will know the main idea of this game already. Based on the properties of polygons this game for two or more players is a fun way to learn geometric facts.

 

Curriculum for Approximation:

Years 7 to 9

Pupils should be taught to use approximation through rounding to estimate answers and calculate possible resulting errors expressed using inequality notation a<x≤b more...

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Notes:

Approximating a quantity is often to get a value that is easier to use or understand, 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.

The error introduced when approximating a value may be further magnified with subsequent calculations. Understanding this error and how it can be minimised is another important aspect of this topic.

See also the "Rounding" and "Estimating" Starters.

Approximation Teacher Resources:

Rounding Snap: If the last card put down equals the previous card to the nearest whole number then all players race to shout SNAP!

Approximation Activities:

Rough Answers: An exercise on rounding values in a calculation to find an approximate estimate of the answer.

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!

Rounding Ten: Round the numbers to the nearest whole number or the given power of ten.

Upper and Lower Bounds: Determine the upper and lower bounds when rounding or truncating quantities used in calculations.

Approximation Videos:

Rounding to decimal places: A straight forward explanation from SLEP

Rounding to significant figures: A straight forward explanation from SLEP

Significant Figures: A CGP Maths Tutor explains what 'significant figures' are then talks you through some examples in this video tutorial.

Approximation External Links:

Links to other websites containing resources for Approximation are provided for those logged into 'Transum Mathematics'. Subscribing also opens up the opportunity for you to add your own links to this panel. You can sign up using one of the buttons below:

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