(1)78×92+78×8,
=78×(92+8),
=78×100,
=7800;
(2)127×24-24×27,
=(127-27)×24,
=100×24,
=2400;
(3)(25+20)×4,
=25×4+20×4,
=100+80,
=180;
(4)(125-30)×80,
=125×80-30×80,
=10000-2400,
=7600;
(5)39×56+56×56+5×56,
=(39+56+5)×56,
=100×56,
=5600;
(6)24×45-45×9+85×45,
=45×(24-9+85),
=45×100,
=4500;
(7)43×99,
=43×(100-1),
=43×100-43,
=4300-43,
=4257;
(8)207×101,
=207×(100+1),
=207×100+207,
=20700+207,
=20907.