а) 256 ∶ 32 - 13 091 ∶ 13 = 8 - 1007 = - 999
б) (1331 - 57 × 11) ∶ 44 = (1331 - 627) ∶ 44 = 704 ∶ 44 = 16
в) 402 ∶ 52 - 27 135 ∶ 27 = 7,7307... - 1005 = - 997,2692...
г) (1728 - 93 × 12) ∶ 36 = (1728 - 1116) ∶ 36 = 612 ∶ 36 = 17
Ответ: а) -999; б) 16; в) -997,2692...; г) 17