Ответ:45 − (10 + 5) = 45 − 15 = 30.95 − 50 = 45.(10 − 7) + 80 = 3 + 80 = 83.50 + 32 = 82.54 − 4 = 50.40 − 21 = 19.43 + 20 = 63.Ответ: 30; 45; 83; 82; 50; 19; 63.