Pi Day

March 14 is Pi Day - 3.14 ...... 

Fun anti-Pi rant from the Khan Academy - actually there is a lot of serious maths in here!

Happy Pi Day.



Anti-Pi Rant, 3/14/14: Sorry, Pi lovers! Maybe pick a better favorite number next time?

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Integers Revision

Don't worry if you don't get these all right the first time - with practise you will! However they are important. If you make any mistakes try to figure out where you are going wrong. Don't worry too much about Q.1.

A copy of the worksheet is here and the solutions are here. Correction second last one in Q.6 should be -22.


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Integers

After the Natural numbers we next meet the Integers.

The Integers include all the whole positive and negative numbers and zero

We use N to stand for the set of Natural numbers but surprisingly we use Z to stand for the set of of Integers - this comes from the German for "number". This picture was taken in the German classroom.

Integers - Subtracting Negative Numbers

This page should help you to understand how we subtract negative numbers with a nice visual animation.  

Don't try to analyse it too much - it is just another way of thinking about how you can subtract a negative! 

Three PowerPoint presentations on the positive and negative numbers that also use this model.

You can always use the number line to help you understand adding and subtracting integers see these animations
Addition
Subtraction
Bunny!

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