直接写得数．4.3÷1000= 0.6﹣0.47= 25×80= 0.75+0.3=1﹣0.06= 0.8+4.7= 0.75×100= 5.6÷100×10=
计算下列各题．==．
直接写出得数．== 1﹣ 2.4+===
直接写出得数． 4x+6x= 10﹣﹣= 1﹣=﹣=+=+=﹣= x+3x+7x=+= 1﹣﹣=﹣=+=
计算下面各题，能简便的要简便．++++ 4﹣﹣ 78﹣8.5+22﹣0.5﹣（+）﹣++．
直接写出得数．==========
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