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看来少了.7;
0.627×13+0.52×62.7
=6.27*1.3+6.27*5.2
=6.27*(1.3+5.2)
=6.27*6.5
=40.755
0.627×13+0.52×62.7
=6.27*1.3+6.27*5.2
=6.27*(1.3+5.2)
=6.27*6.5
=40.755
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0.627*13+0.52*62
=0.627*13+0.04*13*62
=0.627*13+2.48*13
=(0.627+2.48)*13
=3.727*13
=48.451
=0.627*13+0.04*13*62
=0.627*13+2.48*13
=(0.627+2.48)*13
=3.727*13
=48.451
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