revsion on chapter 1

MULTIPLYING AND DIVIDING NEGATIVE NUMBERS5x-3 you work this out by doing 5x3 which=15 then we can see that in the sum there is a minus (-3) so all we need to do is add a  - so the answer is -15but it is different if you want to do this sum: -2x-2 so we start the same as last time so we do 2x2 which= 4 then we see that there are this time 2 -'s so we do the sum -+=+ so the answer is just 4

Multiplying negative numbers is exactly the same as adding subtracting and dividing.

HCF (highest common factor) 20                       30 1-20                    1-30 5-4                      6-5                HCF=10 2-10                    3-10 14-12                  2-15             

LCM (lowest common factor)10,20,30,40,50 50,100,150,200,250    LCM=50

powers  and roots

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