Вычислите: −13 + (−14); 18 + 17; 78 + 22; 45 + 18; −15 + (−6); 41 + 19; 39 + 12; −2,3 + (−4,75).

−13 + (−14) = −27

18 + 17 = 35

78 + 22 = 100

45 + 18 = 63

−15 + (−6) = −21

41 + 19 = 60

39 + 12 = 51

−2,3 + (−4,75) = −7,05