6.11+9.22+8.33+7.44+5.55+4.5
展开全部
6.11+9.22+8.33+7.44+15.55+4.5
=15.33+8.33+7.44+15.55+4.5
=23.66+7.44+15.55+4.5
=31.1+15.55+4.5
=46.65+4.5
=51.15
=15.33+8.33+7.44+15.55+4.5
=23.66+7.44+15.55+4.5
=31.1+15.55+4.5
=46.65+4.5
=51.15
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