计算下面题，要写出主要计算过程，能用简便方法的要用简便方法计算
①2.4÷16×800 ②265.3÷1.25÷8 ③0.75×18÷0.15
④2.5×3.2×1.25 ⑤5.23+4.8÷12 ⑥12.65×2.8﹣2.65×2.8．
计算下面题，要写出主要计算过程，能用简便方法的要用简便方法计算
①2.4÷16×800 ②265.3÷1.25÷8 ③0.75×18÷0.15
④2.5×3.2×1.25 ⑤5.23+4.8÷12 ⑥12.65×2.8﹣2.65×2.8．
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