=?====?=
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解:
(1),
=×[÷],
=×,
=;
(2),
=[25+]×4,
=25×4+×4,
=100+,
=102;
(3),
=÷×,
=×,
=;
(4),
=÷[5×],
=÷1,
=;
(5),
=[1-]÷,
=÷,
=;
(6),
=[+0]×,
=×,
=.
解析分析:(1)先算加法,再算除法,最后算乘法;
(2)先算小括号里面的加法,再根据乘法分配律进行简算;
(3)先算减法,再按照从左向右的顺序进行计算;
(4)先算减法,再算乘法,最后算除法;
(5)先算加法,再算减法,最后算除法;
(6)0除以任何数都得0,那么0÷()=0,再算加法,最后算乘法.
点评:考查了运算定律与简便运算,四则混合运算.注意运算顺序和运算法则,灵活运用所学的运算定律简便计算.