30.2-17.64+1.539简便方法计算
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30.2-17.64+1.539简便方法计算
![30.2-17.64+1.539简便方法计算](/uploads/image/z/2779587-27-7.jpg?t=30.2-17.64%2B1.539%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
30.2-17.64+1.539
=30.2-17.64+(1.54-0.001)
=30.2-17.64+1.54-0.001
=30.2-(17.64-1.54)-0.001
=30.2-16.1-0.001
=14.1-0.001
=14.099
=30.2-17.64+(1.54-0.001)
=30.2-17.64+1.54-0.001
=30.2-(17.64-1.54)-0.001
=30.2-16.1-0.001
=14.1-0.001
=14.099