=725×(101-1),
=725×100,
=28;
(2)2,5×2,72+0,24×2,5+1,04×2,5,
=2,5×(2,72+0,24+1,04),
=2,5×4,
=10;
(3)200-120÷1.6×1.2,
=200-(120÷4)×(1.2÷0.4),
=200-30×3,
=200-90,
=110.
=725×(101-1),
=725×100,
=28;
(2)2,5×2,72+0,24×2,5+1,04×2,5,
=2,5×(2,72+0,24+1,04),
=2,5×4,
=10;
(3)200-120÷1.6×1.2,
=200-(120÷4)×(1.2÷0.4),
=200-30×3,
=200-90,
=110.