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27.2x3/8+5又5/4x0.375-37.5%
=27.2x0.375+5.8x0.375-0.375
=(27.2+5.8-1)x0.375
=32x0.375
=12
=27.2x0.375+5.8x0.375-0.375
=(27.2+5.8-1)x0.375
=32x0.375
=12
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展开全部
27.2x3/8+5又5/4x0.375-37.5%
=0.375X(27.2+5.8-1)
=(3/8)X32
=3X4
=12
=0.375X(27.2+5.8-1)
=(3/8)X32
=3X4
=12
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