100-5-15 = 80
90-30+7 = 67
(74+20)-4 = 90-4 = 86
(40+5)-20 = 45-20 = 25
50+(100-70) = 50+30 = 80
Ответ: 80, 67, 86, 25, 80.
100-5-15 = 80
90-30+7 = 67
(74+20)-4 = 90-4 = 86
(40+5)-20 = 45-20 = 25
50+(100-70) = 50+30 = 80
Ответ: 80, 67, 86, 25, 80.