а) +(15+7-8+11) = 15+7-8+11 = 25
б) -(12-9+14-1) = 12+9-14+1 = 8
в) 17-(6+5-4) = 17-6-5+4 = 10
г) 26+(17-7+15) = 26+17-7+15 = 51
д) 150-(100+25-17)+2= 150-100-25+17+2 = 44
а) +(15+7-8+11) = 15+7-8+11 = 25
б) -(12-9+14-1) = 12+9-14+1 = 8
в) 17-(6+5-4) = 17-6-5+4 = 10
г) 26+(17-7+15) = 26+17-7+15 = 51
д) 150-(100+25-17)+2= 150-100-25+17+2 = 44