脱式计算，能简便计算的要简算．13÷0.4÷2.5 1.25×2.5×0.8 1.5×101﹣1.5 4.8×101．
计算：= ；﹣= ．
直接写出结果． 1.2﹣0.8= 7.8+0.6= 5.44﹣3.6= 1﹣0.04= 5.8+3.02= 0.67﹣0.58=﹣=+=﹣=
直接写出得数．============
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