口算下面各题.(1)÷= (2)0÷= (3)1÷= (4)÷1= (5)=(6)÷3= (7)×= (8)= (9)= (10).
4.2÷0.2= = =0.1+0.2×0.3= .
直接写得数0.125×8= 0.056×= 7÷1.4= 1.75+25%=1.8×(1﹣)= ×0.3= ×9+×9= =1÷0.1﹣1×0.1= =
3﹣1.06= = 0.1+0.2×0.3= =
直接写得数.1﹣0.92= 12.12﹣12= = == = 2.7+1.63+7.3= 0.83×9+0.83=1.25×= 78÷2.5÷4=
直接写出得数.2.35+1.5= +2.5= += 0.32= 12÷=×8= ÷= 2.8﹣2= 8.2﹣(5.3﹣1.8)= 0.1+99×0.1=