(1)45×[(1100-180)÷40]
=45×[920÷40]
=45×23
=1035;
(2)102×38
=100×38+2×38
=3800+76
=3876;
(3)98×101-98
=98×(101-1)
=98×100
=9800;
(4)421-175-25
=421-(175+25)
=421-200
=221;
(5)25×32×125
=25×4×(8×125)
=100×1000
=100000;
(6)360×52+480×36
=36×(520+480)
=36×1000
=36000.