oprasi hitung campuran 1. 13-45+28 2. -73+56-(-14) 3. -30-24+115 4.-4+(-18)-9 5. 14+(-25)-21 6. -12-(-23)+35 7. 9-8+(-7)...

1. 13-45+28 = (-4)
2. -73+56-(-14) = (-3)
3. -30-24+115 = 61
4. -4+(-18)-9 = (-31)
5. 14+(-25)-21 = (-32 (
6. -12-(-23)+35 = 46
7. 9-8+(-7) = (-6)