-1/3+ -2/3 -2/7- 3/-14 x 2/9 1/5 x -2/7 +-2/4 x 4/5 – 1(5/7)

2 bình luận về “-1/3+ -2/3 -2/7- 3/-14 x 2/9 1/5 x -2/7 +-2/4 x 4/5 – 1(5/7)”

1. Gửi e

   

   Trả lời
2. -1/3 + (-2)/3

   = (- 1 – 2)/3

   =  -3/3 = -1

   —

   -2/7 – 3/-14 xx 2/9

   = -2/7 + 3/14 xx 2/9

   = -2/7 + 1/21

   = -6/21 + 1/21

   = -5/21

   —

   1/5 xx (-2)/7 + (-2)/4 xx 4/5 – 1 . 5/7

   = -2/35 + (-2)/5 – 5/7

   = -2/35 – 14/35 – 25/35

   = -41/35

   Trả lời