1 3/4+2 1/3-(1 1/6-1/2) даю 25 баллов!!!!!!!!!!!!!!!!!!!!!!!!!

1 3/4 + 2 1/3 - (1 1/6 - 1/2) = 7/4 + 7/3 - (7/6-1/2) = =  21/12 + 28/12 - ( 14/12 - 6/12) = 49/12 - 8/12 = 41/12 = 3  5/12

=4 1/12-1 1/3=2 3/4 перед первым равно пример