Пошаговое объяснение:
1. 2.7 * 4 = 27/10 * 4 = 108/10 = 10.8
2. / = 381/30 * 10/108 = 381/324 = 127/108
3.
4. 2849/540 * 4/5 = 11396/2700 = 5698/1350 = 2849/675
5.
6. 11 * 1/10 = 11 * 0.1 = 1.1
7. 28 - 1.1 = 26.9
8.
9.
Пошаговое объяснение:
1. 2.7 * 4 = 27/10 * 4 = 108/10 = 10.8
2. / = 381/30 * 10/108 = 381/324 = 127/108
3.
4. 2849/540 * 4/5 = 11396/2700 = 5698/1350 = 2849/675
5.
6. 11 * 1/10 = 11 * 0.1 = 1.1
7. 28 - 1.1 = 26.9
8.
9.