题目内容

能简便的用简便方法计算.
600÷25÷4             
156×63+156×36          
40×13×0.25 14.27-9.62-4.38      
4.57×0.39+5.43×0.39        4.9×99+4.9
分析:(1)根据连除的性质进行计算;
(2)根据乘法分配律进行计算;
(3)根据乘法交换律进行计算;
(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)根据乘法分配律进行计算.
解答:解:
(1)600÷25÷4,
=600÷(25×4),
=600÷100,
=6;

(2)156×63+156×36,
=156×(63+36),
=156×99,
=156×(100-1),
=156×100-156×1,
=15600-156,
=15444;

(3)40×13×0.25,
=40×0.25×13,
=10×13,
=130;

(4)14.27-9.62-4.38,
=14.27-(9.62+4.38),
=14.27-14,
=0.27;

(5)4.57×0.39+5.43×0.39,
=(4.57+5.43)×0.39,
=10×0.39,
=3.9;

(6)4.9×99+4.9,
=4.9×(99+1),
=4.9×100,
=490.
点评:完成本题要注意分析式中数据,运用合适的简便方法计算.
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