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Page 1

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Surds
^ Name given to numbers in a square root sign ^

eg: 12 = 4x3 = 4 x 3 = 2 x 3 = 2 3
Adding and Subtracting








Multiplying Rule 1 acts in both directions

















Rational and Irrational Numbers
Rational
1. A fraction a/b, where a and b…

Page 2

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Irrational
Can't be written in those 3 forms.
e.g: or or



Expressing recurring decimals as fractions
0.3 = 0.333333333333......

Let x = 0.333333333....

X10: 10x = 3.33333333...

10x-x = 3

9x = 3

x = 3/9 = 1/3


0.23 means 0.232323232323...

Let x = 0.23232323....

X100: 100x = 23.23232323....

100x-x…

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