Пошаговое объяснение:
1) 2,375 : (3/4)² = 2 375/1000 : 9/16 = 2 3/8 : 9/16 = 19/8 * 16/9 = 38/9
2) 4 1/2 - 2 1/19 = 4 19/38 - 2 2/38 = 2 17/38
3) 38/9 * 2 17/38 = 38/9 * 93/38 = 93/9 = 10 3/9 = 10 1/3
