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  1. Top | #1

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  2. Top | #2

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    (1) :
    (3+6=9)
    36 9 x
    ( )
    ( = ) ( )
    (5)-(8)=-3 58 .
    ( ):
    A AA A
    a,b A (*) (a*b)
    .
    (1) 7
    (10+7=17) 0 (a+b)12 10+7=17 12 5
    (2) : ( )( )
    7+9=16 8 16+8=24 9+8=17 7=24
    (3) a+0=0+a=a (1) a=a0=0a
    a-0=a 0-a=-a (e)
    (4) =0 (8)+(-8)=0 = . R . :


    aa


    : A (
    . (A,*) (
    (*) A
    :(A,*,o)






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  3. Top | #3

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    : (*,A)

    (1) *,A) a,b,c A
    (a*b)*c=a*(b*c)
    (2) (*) (e): a
    Aa*e=e*a=a
    (3) (*):a*a=a=a*a
    (*) a*b=b*a
    [URL="http://alnasiry.net/forums"][IMG]http://alnasiry.net/forums/uploaded/2_iraqiflag.gif[/IMG][/URL]


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