(1)25×125×4,
=125×(25×4),
=125×100,
=12500;
(2)25×(4+2),
=25×4+25×2,
=100+50,
=150;
(3)124×25-25×24,
=(124-24)×25,
=100×25,
=2500;
(4)25×24,
=(25×4)×6,
=100×6,
=600.
(1)25×125×4,
=125×(25×4),
=125×100,
=12500;
(2)25×(4+2),
=25×4+25×2,
=100+50,
=150;
(3)124×25-25×24,
=(124-24)×25,
=100×25,
=2500;
(4)25×24,
=(25×4)×6,
=100×6,
=600.