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5×0.75+7.5×75%
数学公式×88+数学公式÷数学公式
数学公式÷12.5%×(数学公式+数学公式)  
数学公式-数学公式×(数学公式+25%)

解:(1)5×0.75+7.5×75%
=3.75+5.625,
=9.375;

(2)×88+÷
=×88+×88,
=(+)×88,
=1×88,
=88;

(3)÷12.5%×(+
=0.125÷12.5×
=0.01×1.25,
=0.0125;

(4)-×(+25%)
=-×
=-
=
分析:(1)(3)(4)根据四则混合运算的运算顺序计算即可:先算乘除,再算加减,有括号的要先算括号里面的.
(2)可根据乘法分配律计算.
点评:当算式同时含有分数、百分数或小数时,要根据式中数据的特点将它们灵活互化后进行计算.
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