Câu 1 a, 1/8-1/2 b, -11/12-(-1) c, 3/5-5/6 d, -1/16-1/15 e, 11/36-(-7)/24 g,-5/9-(-5)/12 Câu 2 x-3/4=1/2 b, -5/6-x=7/12+(-1)/3

0 bình luận về “Câu 1 a, 1/8-1/2 b, -11/12-(-1) c, 3/5-5/6 d, -1/16-1/15 e, 11/36-(-7)/24 g,-5/9-(-5)/12 Câu 2 x-3/4=1/2 b, -5/6-x=7/12+(-1)/3”

1. #

   `a) 1/8 – 1/2`

   `= -3/8`

   `b) -11/12 – (-1)`

   `= -11/12 + 1`

   `= 1/12`

   `c) 3/5 – 5/6`

   `= -7/30`

   `d) -1/16 – 1/15`

   `= -21/80`

   `e) 11/36 – (-7/24)`

   `= 11/36 + 7/24`

   `= 43/72`

   `g) -5/9 – (-5/12)`

   `= -5/9 + 5/12`

   `= -5/36`

   Câu 2

   `a) x – 3/4 = 1/2`

   `-> x  = 1/2 + 3/4`

   `-> x = 5/4`

   `b) -5/6 – x = 7/12 + (-1/3)`

   `-> -5/6 – x = 1/4`

   `-> x = -5/6 – 1/4`

   `-> x = -13/12`

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2. Câu 1:

   a, 1/8 – 1/2

   = 1/8 – 4/8

   = -3/8

   b, -11/12 – (-1)

   = -11/12 + 1

   = -11/12 + 12/12

   = 1/12

   c, 3/5 – 5/6

   = 18/30 – 25/30

   = -7/30

   d, -1/16 – 1/15

   = -15/240 – 16/240

   = -31/240

   e, 11/36 – (-7)/24

   = 22/72 + 21/72

   = 43/72

   g,-5/9 – (-5)/12

   = -20/36 + 15/36

   = -5/36

   Câu 2:

   x – 3/4 = 1/2

   x = 1/2 + 3/4

   x = 2/4 + 3/4

   x = 5/4

   Vậy x = 5/4

   b, -5/6-x=7/12+(-1)/3

   -5/6 – x = 7/12 + (-4)/12

   -5/6 – x = 1/4

   x = -5/6 – 1/4

   x = -20/24 – 6/24

   x = -26/24 = -13/12

   Vậy x = -13/12

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