用简便方法计算0.38x101(4.6-3.2)x11.5
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0.38x101
=0.38*100+0.38
=38+0.38
=38.38
(4.6-3.2)x11.5
=1.4*11.5
=16.1
0.38x101
=0.38*100+0.38
=38+0.38
=38.38
(4.6-3.2)x11.5
=1.4*11.5
=16.1
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