14.4x5.2x3.2 (简便运算)

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14.4x5.2x3.2 (简便运算)
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14.4x5.2x3.2 (简便运算)
14.4x5.2x3.2 (简便运算)

14.4x5.2x3.2 (简便运算)
14.4*5.2*3.2
=14.4*3.2*(5+0.2)
=46.08*(5+0.2)
=230.4+9.216
=239.616