Question

3/14-1 (целая) 8/21+5/7=???

Answer 1

3/14 - 1 8/21 + 5/7 = 9/42 - 1 16/42 + 30/42 = 9/42 - 58/42 + 30/42 = - 19/42

Answer 2

314-1 целая 821=314-2921=942-5842=9-5842= - 76; - 76+57=7*77*6 - 6*56*7 = -4942- 3042= -1 целая 3742