18
Пошаговое объяснение:
1) 3 4/5 + 0.45 = 3.8 + 0.45 = 4.25
2) 4.25 * 12/3 = 4.25 * 4 = 17
3) 4.2 - 2/35 = (1470-20) / 350 = 1450/350 = 29/7 = 4 1/7
4) 4/7 / 4 1/7 = 1
5) 17 + 1 = 18
18
Пошаговое объяснение:
1) 3 4/5 + 0.45 = 3.8 + 0.45 = 4.25
2) 4.25 * 12/3 = 4.25 * 4 = 17
3) 4.2 - 2/35 = (1470-20) / 350 = 1450/350 = 29/7 = 4 1/7
4) 4/7 / 4 1/7 = 1
5) 17 + 1 = 18