计算下面各题.21.36÷0.8-12.9

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计算下面各题.21.36÷0.8-12.9计算下面各题.21.36÷0.8-12.9计算下面各题.21.36÷0.8-12.913.8

计算下面各题.21.36÷0.8-12.9
计算下面各题.21.36÷0.8-12.9

计算下面各题.21.36÷0.8-12.9
13.8