properties of ratio

commutative

a : b = c : d  => d : c = b: a 

 

subtraction and addition of ratio

a : b = c : d  => a±b : b = c±d : d,  a : b±a = c : d±c

 

addition of ratio

a/x = b/y =  (a+b) / (x+y)

 

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  • #1

    sex tel (Wednesday, 18 January 2017 10:46)

    robotnikowi