9.3✘5/6✘4/9-7.3✘4/9的简算？
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9.3×5/6×4/9-7.3×4/9
=93/10×5/6×4/9-73/10×4/9
=4/9×(93/10×5/6-73/10)
=4/9×(31/4-73/10)
=4/9×(31×5-73×2)/20
=4/9×9/20
=0.2
=93/10×5/6×4/9-73/10×4/9
=4/9×(93/10×5/6-73/10)
=4/9×(31/4-73/10)
=4/9×(31×5-73×2)/20
=4/9×9/20
=0.2
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