Ответ:
4/19; 1; 3/4
Пошаговое объяснение:
1. (7/12 - 1/3) • 16/19 = 4/19
1) 7/12 - 1/3 = 7/12 - 4/12 = 3/12 = 1/4
2) 1/4 • 16/19 = 16/(4 • 19) = 4/19
2. (11/24 + 1/6)•1 3/5 = 1
1) 11/24 + 1/6 = 11/24 + 4/24 = 15/24 = 5/8
2) 1 3/5 = 8/5
3) 5/8 • 8/5 = 1 (обратные дроби)
3. (7 - 2 5/16) • 4/25
1) 7 - 2 5/16 = 7 - 37/16 = 112/16 - 37/16 = 75/16
2) 75/16 • 4/25 = (75 • 4)/(16 • 25) = 75/(4 • 25) = 75/100 = 3/4