一道简便计算 3.6*31.4+43.9*6.4
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一道简便计算 3.6*31.4+43.9*6.4
一道简便计算
3.6*31.4+43.9*6.4
一道简便计算 3.6*31.4+43.9*6.4
3.6*31.4+6.4*(31.4+12.5)
=3.6*31.4+6.4*31.4+6.4*12.5
=31.4*(3.6+6.4)+8*0.8*12.5
=314+80
=394