6, 1/9-15/11-9/20

2 bình luận về “6, 1/9-15/11-9/20”

1. 1/9-15/11-9/20

   =(1×220) /(9×220) -(15×180) /(11×180) -(9×99) /(20×99)

   =220/1980 -2700/1980 -891/1980

   =- (3371) /(1980

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2. $\frac{1}{9}$-$\frac{15}{11}$-$\frac{9}{20}$=$\frac{110}{990}$-$\frac{1350}{990}$-$\frac{495}{990}$=$\frac{110-1350-495}{990}$=$\frac{-1735}{990}$=$\frac{x}{y}$=$\frac{-347}{198}$
   xin 5sao + ctlhn 

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