75+360÷20+48 125×39×8×237×28+28×63 9.26-1.36-0.26-3.6458×99+58 5.76-(3.76+1.8)
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解:
(1)75+360÷20+48,
=75+18+48,
=93+48,
=141;
(2)125×39×8×2,
=(125×8)×(39×2),
=1000×78,
=78000;
(3)37×28+28×63,
=(37+63)×28,
=100×28,
=2800;
(4)9.26-1.36-0.26-3.64,
=(9.26-0.26)-(1.36+3.64),
=9-5,
=4;
(5)58×99+58,
=58×(99+1),
=58×100,
=5800;
(6)5.76-(3.76+1.8),
=5.76-3.76-1.8,
=2-1.8,
=0.2.
解析分析:(1)先算除法,再按照从左向右的顺序进行计算;
(2)根据乘法交换律和结合律进行计算;
(3)根据乘法分配律进行计算;
(4)根据连减的性质进行计算;
(5)根据乘法分配律进行计算;
(6)根据连减的性质进行计算.
点评:此题主要考查整数数的四则混合运算的运算顺序和应用运算定律进行简便计算.