27 x -53 + 27 x 47 17/6 + 26/-12- -13/39 2/7 + -5/7 x 14/35 -1/4 + [ -5/8 + 1/4]

0 bình luận về “27 x -53 + 27 x 47 17/6 + 26/-12- -13/39 2/7 + -5/7 x 14/35 -1/4 + [ -5/8 + 1/4]”

1. ` 27 * (-53) +27 *47`

   ` =27 * (-53+47)`

   ` = 27 * (-6)`

   ` = -162`

   —–

   ` 17/6 +26/(-12) – (-13)/39`

   ` = 17/6 – 26/12 +13/39`

   ` = 17/6 – 13/6 + 1/3`

   ` = 4/6 + 1/3`

   ` = 2/3 +1/3`

   ` = 3/3 = 1`

   ——

   ` 2/7 + (-5)/7 * 14/35 = 2/7 – 5/7 * 2/5 = 2/7 – 10/35 = 2/7 -2/7`

   ` =0`

   ——–

   ` -1/4 + [-5/8 +1/4]`

   ` = -1/4 -5/8 +1/4`

   ` = (-1/4 +1/4) -5/8`

   ` = -5/8`

   Trả lời