(1)480÷[(12+18)×2]
=480÷[30×2]
=480÷60
=8;
所以12+18=30,30×2=60,480÷60=8列成综合算式是480÷[(12+18)×2];
(2)120+3×(30-10)
=120+3×20
=120+60
=180;
所以30-10=20,3×20=60,120+60=180列成综合算式是120+3×(30-10).
故答案为:(1)480÷[(12+18)×2](2)120+3×(30-10).
(1)480÷[(12+18)×2]
=480÷[30×2]
=480÷60
=8;
所以12+18=30,30×2=60,480÷60=8列成综合算式是480÷[(12+18)×2];
(2)120+3×(30-10)
=120+3×20
=120+60
=180;
所以30-10=20,3×20=60,120+60=180列成综合算式是120+3×(30-10).
故答案为:(1)480÷[(12+18)×2](2)120+3×(30-10).