0.25×60%+0.5×20%简便计算?拜托了
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0.25×60%+0.5×20%
=0.25×60%+0.25×2×20%
=0.25×(60%+2×20%)
=0.25×1
=0.25
=0.25×60%+0.25×2×20%
=0.25×(60%+2×20%)
=0.25×1
=0.25
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