2) 40 - (46-30), 20+(50-25), 80+(17+3), 60+(32+8), 0-0, 5-5

Решение:

1. \( 40 - (46 - 30) = 40 - 16 = 24 \)
2. \( 20 + (50 - 25) = 20 + 25 = 45 \)
3. \( 80 + (17 + 3) = 80 + 20 = 100 \)
4. \( 60 + (32 + 8) = 60 + 40 = 100 \)
5. \( 0 - 0 = 0 \)
6. \( 5 - 5 = 0 \)

Ответ: 24, 45, 100, 100, 0, 0.