Пошаговое объяснение:
3/6 * 12 = 36/6 = 6
0,15 = 15/100 = 3/20
3/20 * 30 = 90/20 = 4 10/20 = 4 1/2 = 4,5
2/7 * 6 2/3 = 2/7 * 20/3 = 40/21
Пошаговое объяснение:
3/6 * 12 = 36/6 = 6
0,15 = 15/100 = 3/20
3/20 * 30 = 90/20 = 4 10/20 = 4 1/2 = 4,5
2/7 * 6 2/3 = 2/7 * 20/3 = 40/21