Treść zadania

Rozwiązania

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  1 0

  sonar 11.9.2012 (21:32)

  0,9 : 1/5 + 1/3 - 3/5=
  
  = 9/10 : 1/5 + 1/3 - 1/5=
  
  = 9/10 * 5/1 + 1/3 - 1/5= (skracam 10 z 5)
  
  = 9/2 * 1/1 + 1/3 - 1/5=
  
  = 9/2 + 1/3 - 1/5=
  
  = 4 i 1/2 + 1/3 - 1/5= 9sprowadzam ułamki do wspólnego mianownika -> 30)
  
  = 4 i 15/30 + 10/30 - 6/30=
  
  = 4 i 25/30 - 6/30=
  
  = 4 i 19/30
  
  
  
  
  2 i 1/7 * 1,6 * 2 i 1/3=
  
  = 15/7 * 1 i 6/10 * 7/3=
  
  = 15/7 * 16/10 * 7/3= (skracam 15 z 3 0raz 7 z7)
  
  = 5/1 * 16/10 * 1/1= ( skracam 5 z 10)
  
  = 1/1 * 16/2 =
  
  = 16/2=
  
  = 8
  
  
  
  
  2 i 6/11 : 7/11 :3,4=
  
  = 28/11 * 11/7 : 3 i 4/10= (skracam 28 z 7 oraz 11 z 11)
  
  = 4/1 * 1/1 : 34/10=
  
  = 4 * 10/34 = (skracam 4 z 34)
  
  = 2 * 10/17=
  
  = 20/17=
  
  = 1 i 3/17
  
  
  
  
  
  
  
  6 i 2/3 * ( 0.25 + 1/5)=
  
  = 20/3 * (25/100 + 1/5)=
  
  = 20/3 * ( 1/4 + 1/5)=
  
  = 20/3 * (5/20 + 4/20)=
  
  = 20/3 * 9/20 = ( skracam 20 z 20 oraz 3 z 9)
  
  = 1/1 * 3/1=
  
  = 3/1 =
  
  = 3
  
  
  
  
  1 i 5/9 : 1 i 1/3 * 0.75=
  
  = 14/9 : 4/3 * 75/100=
  
  = 14/9 * 3/4 * 3/4= (skracam 14 z 4 oraz 9 z 3)
  
  = 7/3 * 1/2 * 3/4=
  
  = 21/24=
  
  = 7/8
  
  
  
  
  3 i 1/3 - 1/3 * 0.6=
  
  = 3 i 1/3 - 1/3 * 6/10= (skracam 3 z 6)
  
  = 3 i 1/3 - 1/1 * 2/10=
  
  = 3 i 1/3 - 2/10=
  
  = 3 i 10/30 - 6/30=
  
  = 3 i 4/30=
  
  = 3 i 2/15
  
  
  
  3 i 4/9 - 1 i 2/3 * 1.8=
  
  = 3 i 4/9 - 5/3 * 1 i 8/10=
  
  = 3 i 4/9 - 5/3 * 18/10= (skracam 5 z 10 oraz 3 z 18)
  
  = 3 i 4/9 - 1/1 * 6/2=
  
  = 3 i 4/9 - 6/2=
  
  = 3 i 4/9 - 3=
  
  = 4/9
  
  
  
  4.5 * 5 i 5/9 + 6,4 * 3/8 =
  
  = 4 i 5/10 * 50/9 + 6 i 4/10 * 3/8=
  
  = 45/10 * 50/9 + 64/10 * 3/8= ( skracam 45 z9 , 10 z 5 oraz 64 z 8)
  
  = 5/1 * 5/1 + 8/10 * 3/1=
  
  = 25/1 + 24/10=
  
  = 25 + 2 i 4/10=
  
  = 27 i 4/10=
  
  = 27 i 2/5

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