A. -3/4+1/3-1/18 B. (1/3)^3:1⅜ – 25%.(-6 ²/¹¹) C. 75%-(1,25-2¾):3^2/2

0 bình luận về “A. -3/4+1/3-1/18 B. (1/3)^3:1⅜ – 25%.(-6 ²/¹¹) C. 75%-(1,25-2¾):3^2/2”

1. a.. -3/4+1/3-1/18

   =-5/12-1/18

   =-17/36

   b.(1/3)^3:1⅜ – 25%.(-6 ²/¹¹)

   =1/27:11/8-0,25.-68/11

   =8/297–17/11

   =-41/27

   c.75%-(1,25-2¾):3^2/2

   =0,75-(1,25-11/4):9/2

   =0,75-(-3/2):9/2

   =0,75–1/3

   =13/12

    

   Trả lời

2. Đáp án + giải thích bước giải :

   `A = (-3)/4 + 1/3 – 1/18`

   `-> A = (-5)/12 – 1/18`

   `-> A = (-17)/36`

   Vậy `A = (-17)/36`

   `B = (1/3)^3 : 1 3/8 – 25% (-6 2/11)`

   `-> B = 1/27 : 11/8 – 1/4 . (-68/11)`

   `-> B = 8/297 – (-17/11)`

   `-> B = 467/297`

   Vậy `B = 467/297`

   `C = 75% – (1,25 – 2 3/4) : 3^2/2`

   `-> C = 3/4 – (1,25 – 11/4) : 9/2`

   `-> C = 3/4 -(-3/2) . 2/9`

   `-> C = 3/4 – (-1/3)`

   `-> C = 13/12`

   Vậy `C = 13/12`

    

   Trả lời