用小数计算下面各题．（1）20米16厘米﹣7米4分米（2）9千米80米+1千米6米（3）6吨4千克﹣5吨14千克．
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．============
计算下面各题．．
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