问题
解答题
用简便方法计算.
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答案
(1)201×24,
=(200+1)×24,
=200×24+24,
=2400+24,
=2424;
(2)37×99+37,
=37×(99+1),
=37×100,
=3700;
(3)125×(7×8),
=125×8×7,
=1000×7,
=7000;
(4)25×7×5×4,
=25×4×(7×5),
=100×35,
=3500.
用简便方法计算.
|
(1)201×24,
=(200+1)×24,
=200×24+24,
=2400+24,
=2424;
(2)37×99+37,
=37×(99+1),
=37×100,
=3700;
(3)125×(7×8),
=125×8×7,
=1000×7,
=7000;
(4)25×7×5×4,
=25×4×(7×5),
=100×35,
=3500.