0.87*3.16+4.64怎么样运算简便
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0.87*3.16+4.64怎么样运算简便
0.87*3.16+4.64
=(1-0.13)*3.16+4.64
=3.16-0.13*3.16+4.64
=7.8-0.4108
=7.3892
=(1-0.13)*3.16+4.64
=3.16-0.13*3.16+4.64
=7.8-0.4108
=7.3892