31.4*3.6+43.9*6.4
人气：137 ℃ 时间：2020-04-16 19:52:35
解答
31.4*3.6+43.9*6.4
=31.4*(1-6.4)+43.9*6.4
=31.4-31.4*6.4+43.9*6.4
=31.4+(43.9-31.4)*6.4
=31.4+12.5*6.4
=31.4+80
=111.4
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