Thực hiện phép tính: A/ 7/3 × 81/14 B/ 5/12 + -8/7 × 7/12 C/ 5/7 × 19/23 + 5/7 × 5/23 – 5/7 × 1//3 D/ -3/4 × 7/6 + 5/6 × -3/4

0 bình luận về “Thực hiện phép tính: A/ 7/3 × 81/14 B/ 5/12 + -8/7 × 7/12 C/ 5/7 × 19/23 + 5/7 × 5/23 – 5/7 × 1//3 D/ -3/4 × 7/6 + 5/6 × -3/4”

1. A/ 7/3 × 81/14

   = (7×3^4)/(3x2x7)

   = 3^3/2

   = 27/2

   B/ 5/12 + -8/7 × 7/12

   = 5/12 – 8/12

   = -3/12

   = -1/4

   C/ 5/7 × 19/23 + 5/7 × 5/23 – 5/7 × 1/3

   = 5/7 x (19/23 + 5/23 – 1/3)

   = 5/7 x 1

   = 5/7

   D/ -3/4 × 7/6 + 5/6 × -3/4

   = -3/4 x (7/6 +5/6)

   = -3/4 x 2

   = -3/2

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