用简便方法计算
(1)0.13×+×13%
(2)18×25%+68×25%+14÷4.
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解:
(1)0.13×+×13%,
=0.13×+×0.13,
=0.13×(+),
=0.13×1,
=0.13;
(2)18×25%+68×25%+14÷4,
=18×0.25+68×0.25+14×0.25,
=(18+68+14)×0.25,
=100×0.25,
=25.
解析分析:(1)根据乘法分配律近似简算;
(2)根据乘法分配律近似简算.
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.