Treść zadania

Najlepsze rozwiązanie

• 

  1 0

  sonar 17.10.2012 (16:49)

  (1/4 + 0,2) : 1 i 1/5 =
  
  = (1/4 + 2/10) : 6/5=
  
  = (5/20 + 4/20) * 5/6=
  
  = 9/20 * 5/6= (skracam 9 z 6 oraz 20 z 5)
  
  = 3/4 * 1/2=
  
  = 3/8
  
  
  
  
  
  0,5 * 2/3 - 1/6 + 2 * 0,75 =
  
  = 5/10 * 2/3 - 1/6 + 2* 75/100= (skracam 10 z 2)
  
  = 5/5 * 1/3 - 1/6 + 2 * 3/4= (skracam 2 z 4)
  
  = 5/15 - 1/6 + 1* 3/2=
  
  = 1/3 - 1/6 + 3/2=
  
  = 2/6 - 1/6 + 9/6=
  
  = 1/6 + 9/6=
  
  = 10/6=
  
  = 1 i 4/6=
  
  = 1 i 2/3
  
  
  
  
  (1 i 1/9 * 1,5 - 5/6) : (0,4 + 2/25) =
  
  = (10/9 * 1 i 5/10 - 5/6) : ( 4/10 + 2/25)=
  
  = (10/9 * 15/10 - 5/6) : ( 20/50 + 4/50)= (skracam 10 z 10 oraz 9 z 15)
  
  = (1/3 * 5/1 - 5/6) : 24/50=
  
  =(5/3 - 5/6)* 50/24 =
  
  = (10/6 - 5/6) * 50/24=
  
  = 5/6 * 50/24= (skracam 6 z 50)
  
  = 5/3 * 25/24=
  
  = 125/72=
  
  = 1 i 53/72
  
  
  
  
  
  4,25 - 0,2 * 3 i 1/8 =
  
  = 4 i 25/100 - 2/10 * 25/8 = (skracam 2 z 8 oraz 10 z 25)
  
  = 4 i 1/4 - 1/2 * 5/4=
  
  = 4 i 1/4 - 5/8=
  
  = 4 i 2/8 - 5/8=
  
  = 3 i 10/8 - 5/8=
  
  = 3 i 5/8
  
  
  
  
  1/3 + 3,5 * 3/14 =
  
  = 1/3 + 3 i 5/10 * 3/14=
  
  = 1/3 + 35/10 * 3/14 = ( skracam 35 z 14 )
  
  = 1/3 + 5/10 * 3/2=
  
  = 1/3 + 15/20=
  
  = 1/3 + 3/4=
  
  = 4/12 + 9/12=
  
  = 13/12=
  
  = 1 i 1/12
  
  
  
  
  1/9 + 0,9 : 13 i 1/2 =
  
  = 1/9 + 9/10 : 27/2=
  
  = 1/9 + 9/10 * 2/27 = (skracam 9 z 27 oraz 10 z 2)
  
  = 1/9 + 1/5 * 1/3=
  
  = 1/9 + 1/15=
  
  = 5/45 + 3/45 =
  
  = 8/45

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