口算：
2005﹣1998= 1.6×0.05= 5.7÷0.19= 0.125×0.7=
÷
= ÷6= 
÷
= 40×
=
÷
= 
×12= 
×
= 
×201﹣=
口算：
2005﹣1998= 1.6×0.05= 5.7÷0.19= 0.125×0.7=÷= ÷6= ÷= 40×=÷= ×12= ×= ×201﹣=
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