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5×0.75+7.5×75%
數學公式×88+數學公式÷數學公式
數學公式÷12.5%×(數學公式+數學公式)  
數學公式-數學公式×(數學公式+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)根據四則混合運算的運算順序計算即可:先算乘除,再算加減,有括號的要先算括號里面的.
(2)可根據乘法分配律計算.
點評:當算式同時含有分數、百分數或小數時,要根據式中數據的特點將它們靈活互化后進行計算.
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