我会用喜欢的方法直接写出得数249﹣157= 1﹣0.28= 1.25×3×8= =（）×56= 2.5××0.4= 1﹣1÷= 2.7×4+6×2.7=
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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）×56= 2.5×
×0.4= 1﹣1÷
= 2.7×4+6×2.7=
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