Toán Lớp 7: 4`5/8`:`(-5/7)`+5`4/9`:`(-5/7)`

0 bình luận về “Toán Lớp 7: 4`5/8`:`(-5/7)`+5`4/9`:`(-5/7)`”

1. Answer

   4 5/8 : {-5}/7 + 5 4/9 : {-5}/7

   = 37/8 . {-7}/5 + 49/9 . {-7}/5

   = -7/5 . (37/8 + 49/9)

   = -7/5 . 725/72

   = -1015/72

2. Giải đáp:

   4 5/8 : ( -5/7 ) + 5 4/9 : ( -5/7 )

   = 37/8 xx ( -7/5) + 49/9 xx ( -7/5)

   = -7/5 xx ( 37/8 + 49/9 )

   = -7/5 xx 725/72

   = -1015/72