Toán Lớp 7: e) -2: 1/3+1/2 nhân 2/3 + 1/3 f ) -4:9/2+5/2-1/3

0 bình luận về “Toán Lớp 7: e) -2: 1/3+1/2 nhân 2/3 + 1/3 f ) -4:9/2+5/2-1/3”

1. e)

   -2:1/3+1/2×2/3+1/3

   =-2×3/1+1/3+1/3

   =(-6)/1+1/3+1/3

   =(-18)/3+1/3+1/3

   =(-16)/3

   f)

   -4:9/2+5/2-1/3

   =-4×2/9+5/2-1/3

   =(-8)/9+5/2-1/3

   =(-16)/18+45/18-6/18

   =23/18

    

   Trả lời
2. e) -2 : 1/3 + 1/2 . 2/3 + 1/3

   = -6 + 1/3 + 1/3

   = -16/3

   f) -4 : 9/2 + 5/2 – 1/3

   = -8/9 + 5/2 – 1/3

   = ( -8/9 – 1/3) + 5/2

   = (-8/9 – 3/9) + 5/2

   = -11/9 + 5/2

   = 23/18

    

   Trả lời