16.65除[(7.2减0.54)乘2.5]简便计算谢谢,我急等着用.

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16.65除[(7.2减0.54)乘2.5]简便计算谢谢,我急等着用.

16.65除[(7.2减0.54)乘2.5]简便计算谢谢,我急等着用.
16.65除[(7.2减0.54)乘2.5]简便计算
谢谢,我急等着用.

16.65除[(7.2减0.54)乘2.5]简便计算谢谢,我急等着用.
16.65/[(7.2-0.54)*2.5]
=16.65*40/[(7.2-0.54)*2.5*40]
=(17-0.35)*40/[(7.2-0.54)*100]
=(680-14)/(720-54)
=666/666
=1

16.65÷[(7.2-0.54)*2.5]
=16.65÷[(7.2*2.5)-(0.54*2.5)]
=16.65÷[18-1.35]
=16.65÷16.65
=1

[(7.2减0.54)乘2.5用乘法分配率得18-1.35
最后是16.65/16.65=1