(-2)- -5/8 b, -(-1)/21-1/28 c, -3/29 -16/58 d, 13/20- -1/5 e,2/14 -61/28

2 bình luận về “(-2)- -5/8 b, -(-1)/21-1/28 c, -3/29 -16/58 d, 13/20- -1/5 e,2/14 -61/28”

1. Giải đáp:

   a) (-2) – (-5)/8

   = -2 + 5/8

   = (-16)/8 + 5/8

   = (-11)/8

   $\\$

   b) -(-1)/21 – 1/28

   = 1/21 – 1/28

   = 4/84 – 3/84

   = 1/84

   $\\$

   c) (-3)/29 – 16/58

   = (-3)/29 – 8/29

   = (-3-8)/29

   = (-11)/29

   $\\$

   d) 13/20 – (-1)/5

   = 13/20 + 1/5

   = 13/20 + 4/20

   = 17/20

   $\\$

   e) 2/14 – 61/28

   = 4/28 – 61/28

   = (-57)/28

   $#tientoan$

    

    

   Trả lời
2. a)(-2)-(-5/8)

   =-2+5/8

   =-16/8+5/8

   =-11/8

   b)-(-1/21)-1/28

   =1/21-1/28

   =4/84-3/84

   =1/84

   c)-3/29-16/58

   =-3/29-1/3

   =-12/174-58/174

   =-35/37

   d)13/20-(-1/5)

   =13/20+1/5

   =13/20+4/20

   =17/20

   e)2/14-61/28

   =4/28-61/28

   =-57/28

   Trả lời