6.72-3.28-1.72=多少简算
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6.72-3.28-1.72=多少简算
6.72-3.28-1.72=多少简算
6.72-3.28-1.72=多少简算
6.72-3.28-1.72
=6.72-(3.28+1.72)
=6.72-5
=1.72
6.72-3.28-1.72=多少简算
6.72-3.28-1.72=多少简算
6.72-3.28-1.72=多少简算
6.72-3.28-1.72
=6.72-(3.28+1.72)
=6.72-5
=1.72