38.2x7.5+75+0.75x5.18如何简便方法运算?

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38.2x7.5+75+0.75x5.18如何简便方法运算?
38.2x7.5+75+0.75x5.18如何简便方法运算?

38.2x7.5+75+0.75x5.18如何简便方法运算?
38.2x7.5+75+0.75x5.18
=38.2x7.5+10x7.5+7.5x51.8
=7.5x(38.2+10+51.8)
=7.5x100
=750