Question

CALCULE A EXPRESSÃO NUMÉRICA
(2/5 - 1/4). (1/3-1) : (-2 - 4/5)=

Answer 1

(2/5 - 1/4). (1/3 -1 ): ( -2 -4/5) =
(8/20 - 5/20). ( 1/3 - 3/3) : ( -10/5 - 4/5) =
(3/20) . ( -2/3) : ( -14/5 ) =
(3/20) . ( -2/3) . (-5/14) =
(1/10) . (-1/1) . (-5/14) =                         ( simplifiquei as duas primeiras frações)
5/140 = 1/28