簡便計算
248+28+52+7253×9844×2527×57+57×7325×32×12596×107.

解:(1)248+28+52+72,
=(248+52)+(28+72),
=300+100,
=400;

(2)53×98,
=53×(100-2),
=5300-106,
=5194;

(3)44×25,
=11×4×25,
=11×(4×25),
=11×100,
=1100;

(4)27×57+57×73,
=57×(27+73),
=57×100,
=5700;

(5)25×32×125,
=25×4×8×125,
=(25×4)×(8×125),
=100×1000,
=100000;

(6)96×107,
=96×(100+7),
=9600+96×7,
=9600+(100-4)×7,
=9600+700-28,
=10272.
分析:(1)運用加法交換律與結合律簡算;
(2)把98看作100-2,運用乘法分配律簡算;
(3)把44看作11×4,運用乘法結合律簡算;
(4)運用乘法分配律簡算;
(5)把32看作4×8,運用乘法結合律簡算;
(6)把107看作100+7,運用乘法分配律簡算.
點評:完成本題要注意分析式中數(shù)據(jù),運用合適的簡便方法計算.
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