2.51+3.53+0.49-15.4-1.47用简便方法计算
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2.51+3.53+0.49-15.4-1.47用简便方法计算
![2.51+3.53+0.49-15.4-1.47用简便方法计算](/uploads/image/z/6082257-57-7.jpg?t=2.51%2B3.53%2B0.49-15.4-1.47%E7%94%A8%E7%AE%80%E4%BE%BF%E6%96%B9%E6%B3%95%E8%AE%A1%E7%AE%97)
2.51+3.53+0.49-15.4-1.47
=(2.51+0.49)+3.53-1.47-15.4
=3+3.53-16.87
=10.34
再问: 16.87怎么算出来的
再答: 1.47+15.4=16.87
=(2.51+0.49)+3.53-1.47-15.4
=3+3.53-16.87
=10.34
再问: 16.87怎么算出来的
再答: 1.47+15.4=16.87