0 bình luận về “Môn Toán Lớp 6: a : 3/14 +-5/17 +11/14 +(-29/17 ) b 4/11 .9/23 -21/23 :11/4 +4/11”

1. Answer

   a:3/14+(-5)/17+11/14+(-29/27)

   =51/238-70/238+11/14-29/17

   =(51-70)/238+11/14-29/17

   =-19/238+11/14-29/17

   =-19/238+187/238-29/17

   =(-19+187)/238-29/17

   =168/238-29/17

   =12/17-29/17

   =(12-29)/17

   =(-17)/17

   =-1

   b:4/11xx9/23-21/23:11/4+4/11

   =(4xx9)/(11xx23)-21/23:11/4+4/11

   =36/253-21/23:11/4=4/11

   =36/253-21/23xx(4/11)+4/11

   =36/253-84/253+4/11

   =-48/253+4/11

   =-48/253+92/253

   =44/253

   =4/23

   Trả lời
2. Giải đáp+Lời giải và giải thích chi tiết:

   a)

   3/14+(-5)/17+11/14+(-29)/17

   =(3/14+11/14)+((-5)/17+((-29)/17)

   =14/14+(-34)/17

   =1+(-2)

   =-(2-1)

   =-1

   b)

   4/11 . 9/23-21/23 : 11/4+4/11

   =4/11 . 9/23-21/23 . 4/11+4/11 . 1

   =4/11 . (9/23-21/23+1)

   =4/11 . (9/23-21/23+23/23)

   =4/11 . 11/23

   =4/23

   #ld

   Trả lời