25. 250 + 250 \(\cdot\) 2, (250 + 250) : 2, (480 + 120) : 3 60 + 90 : 10 - 3, 60 + 90 : (10 - 3), 120 - 80 : 4 \(\cdot\) 5 84 - 24 + 48 : 6, 84 - (24 + 48) : 6, 100 - 64 + 36 : 4

Решение:

1. 250 + 250 \(\cdot\) 2 = 250 + 500 = 750
2. (250 + 250) : 2 = 500 : 2 = 250
3. (480 + 120) : 3 = 600 : 3 = 200
4. 60 + 90 : 10 - 3 = 60 + 9 - 3 = 66
5. 60 + 90 : (10 - 3) = 60 + 90 : 7 = 60 + 12 \( \frac{6}{7} \) \( \approx 60 + 12.86 = 72.86 \)
6. 120 - 80 : 4 \(\cdot\) 5 = 120 - 20 \(\cdot\) 5 = 120 - 100 = 20
7. 84 - 24 + 48 : 6 = 84 - 24 + 8 = 60 + 8 = 68
8. 84 - (24 + 48) : 6 = 84 - 72 : 6 = 84 - 12 = 72
9. 100 - 64 + 36 : 4 = 100 - 64 + 9 = 36 + 9 = 45

Ответ: 750, 250, 200; 66, \( \approx 72.86 \), 20; 68, 72, 45.