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3.39+4.47+3.51-2.38+4.53-2.62
人气:332 ℃ 时间:2020-01-24 10:37:35
解答
3.39+4.47+3.51-2.38+4.53-2.62
=3.39+3.51+4.47+4.53-2.38-2.62
=6.9+9-5
=10.5
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