计算下面各题．15.6×0.8+6.12÷3.4 9.4×[6.2÷（7﹣6.8）]0.48×4.2+5.8×0.48 [0.45×（4.5+3.7）]÷1.2．
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直接写出得数．============
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直接写出得数．== 1﹣= 4﹣=====
计算下面各题．．
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