Răspuns :
(2 + 16/7) * (6/45 - 2/90 * 3/4) = (14/7 + 16/7) * (2/15 - 1/60) = 30/7 * (8/60 - 1/60) = 30/7 * 7/60 = 1/2
(2+16/7)*(6/45-2/90*3/4) =
= 30/7*(6/45-1/45*3/4) =
= 30/7 * ( 6/45 -1/15 *1/4 ) =
= 30/7 * (6/45 - 1/60 ) = 30/7 * 7/60 = 1/2
= 30/7*(6/45-1/45*3/4) =
= 30/7 * ( 6/45 -1/15 *1/4 ) =
= 30/7 * (6/45 - 1/60 ) = 30/7 * 7/60 = 1/2