(3.6*46.4+58.9*6.4)/17的简便算法

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(3.6*46.4+58.9*6.4)/17的简便算法
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(3.6*46.4+58.9*6.4)/17的简便算法
(3.6*46.4+58.9*6.4)/17的简便算法

(3.6*46.4+58.9*6.4)/17的简便算法
(3.6*46.4+58.9*6.4)/17
=[3.6*(40+6.4)+58.9*6.4]/17
=[144+6.4*(3.6+58.9)]/17
=[144+6.4*62.5/17
=[144+384+16]/17
=544/17
=32

{(10-6.4)*46.4+58.9*6.4}/17={464+6.4*(58.9-46.4)}/17=(464+80)/17=544/17=32