Treść zadania

Najlepsze rozwiązanie

• 

  2 0

  sonar 21.1.2011 (14:17)

  a)
  16 - a = 9
  -a = 9 -16
  -a = -7 /* (-1)
  a= 7
  
  spr.
  16 -9 = 7
  7=7
  L=P
  
  
  b)
  a-29=15
  a= 15 + 29
  a= 44
  
  spr.
  44 - 29 = 15
  15 = 15
  L=P
  
  
  c)
  12 : m = 1/4 /*m
  12 = 1/4 *m / : 1/4
  12 : 1/4 = m
  12/1 * 4/1 = m
  48/1 =m
  48=m
  
  spr.
  12: 48 = 1/4
  12/48 = 1/4
  1/4 = 1/4
  L=P
  
  
  d)
  y * 3 i 1/2 = 2/7 /: 3i1/2
  y = 2/7 : 3 i 1/2
  y = 2/7 :7/2
  y= 2/7 * 2/7
  y = 4/49
  
  spr.
  4/49 *3 i 1/2 = 2/7
  4/49 * 7/2 = 2/7 (skracam 4 z 2 oraz 49 z 7)
  2/7 * 1/1 = 2/7
  2/7 = 2/7
  L=P
  
  
  e)
  12 i 1/3 +k = 16 i 5/6
  k = 16 i 5/6 - 12 i 1/3
  k= 16 i 5/6 - 12 i 2/6
  k=4 i 3/6
  
  spr.
  12 i 1/3 + 4 i 3/6 = 16 i 5/6
  12 i 2/6 + 4 i 3/6 = 16 i 5/6
  16 i 5/6 = 16 i 5/6
  L=P
  
  
  
  f0
  8 i 1/5 + c =10 i 7/10
  c= 10 i 7/10 - 8 i 1/5
  c= 10 i 35/50 - 8 i 10/50
  c= 2 i 25/50
  c= 2 i 1/2
  
  spr.
  8 i 1/5 + 2 i 1/2 = 10 i 7/10
  8 i 10/50 + 2 i 25/50 = 10 i 35/50
  10 i 35/50 = 19 i 35/50
  L=P
  
  g)
  4 i 2/3 * p = 4
  14/3 *p = 4 /: 14/3
  p= 4 : 14/3
  p= 4/1 * 3/14
  p = 12/14
  p = 6/7
  
  
  spr.
  4 i 2/3 * 6/7 = 4
  14/3 * 6/7 = 4 (skracam 17 z 7 oraz 3 z 6)
  2/1 * 2/1 = 4
  4/1 = 4
  4=4
  L=P
  
  
  h)
  a : 1 i 1/3 = 1/6 /* 1 i 1/3
  a= 1/6 * 1 i 1/3
  a= 1/6 * 4/3 (skracam 6 z4)
  a= 1/3 * 2/3
  a= 2/9
  
  
  spr.
  2/9 : 1 i 1/3 = 1/6
  2/9 : 4/3 = 1/6
  2/9 * 3/4 = 1/6
  6/36 = 1/6
  1/6 = 1/6
  L=P

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