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用简便方法计算:0.9999×0.08+0.1111×0.28
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0.9999×0.08+0.1111×0.28
=0.1111×9×0.08+0.1111×0.28
=0.1111×0.72+0.1111×0.28
=0.1111×(0.72+0.28)
=0.1111×1
=0.1111
=0.1111×9×0.08+0.1111×0.28
=0.1111×0.72+0.1111×0.28
=0.1111×(0.72+0.28)
=0.1111×1
=0.1111
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