
用简便的方法计算下面各题.25×125×4 &n...
用简便的方法计算下面各题.25×125×425×(4+2)124×25-25×2425×24....
用简便的方法计算下面各题.25×125×4 25×(4+2) 124×25-25×24 25×24.
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(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.
=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.
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