①125×5×8×2,
=(125×8)×(5×2),
=1000×10,
=10000;
②25×14×4,
=(25×4)×14,
=100×14,
=1400;
③72×17+17×28,
=17×(72+28).
=17×100,
=1700;
④67×101,
=67×(100+1),
=67×100+67,
=6767.
①125×5×8×2,
=(125×8)×(5×2),
=1000×10,
=10000;
②25×14×4,
=(25×4)×14,
=100×14,
=1400;
③72×17+17×28,
=17×(72+28).
=17×100,
=1700;
④67×101,
=67×(100+1),
=67×100+67,
=6767.