6.89-(0.27+0.89)的简便计算
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6.89-(0.27+0.89)的简便计算
6.89-(0.27+0.89)的简便计算
6.89-(0.27+0.89)的简便计算
=6.89-0.27-0.89
=6.89-0.89-0.27
=6-0.27
=5.73
6.89-(0.27+0.89)
=6.89-0.89-0.27
=6-0.27
=5.73
=6.89-0.89-0.27=5.73
6.89-0.27-0.89=6.89-0.89-0.27=6-0.27=5.73