Номер 1135

1) 27,56 + 36 + (–28,56) + (–12) = (27,56 + (–28,56)) + (36 + (–12)) = –1 + 24 = 23;

2) –39,126 + 12,1 + 18 + 21,026 = (–39,126 + 21,026) + 12,1 + 18 = –18,1 + 12,1 + 18 = –6 + 18 = 12;

3) 46 + (–13,03) + 111 + (–32,97) = 46 + 111 + (–13,03 + (–32,97)) = 111 + 46 + (–46) = 111;

4) –103,77 + 24,609 + (–6,33) + 85,391 = (–103,77 + (–6,33)) + (24,609 + 85,391) = –110,1 + 110 = –0,1.