Номер 1103

1) 12 + 15 + (–17) + (–18) + 19 + (–1) = 12 + 15 + 19 + ((–17) + (–18) + (–1)) = 46 + (–36) = 10

2) –23 + 28 + (–11) + (–34) + 29 + 11 = –23 + (–34) + (28 + 29) = –57 + 57 = 0 

3) –44,03 + (–62,07) + 92,13 + 1,05 = –106,1 + 93,18 = –12,92

4) –1592,69 + (–29,47) + 113,92 + (–18,01) = (–1592,69 + (–29,47) + (–18,01)) + 113,92 = –1640,17 + 113,92 = –1526,25