直接写出得数：
15÷1%= 9.1﹣1.9﹣7.1= 0.3×0.3÷0.3×0.3= 0.35×99+0.35=
﹣（﹣
）=÷
×
=
﹣
= 0.25×32×0.125=
+
﹣+
=
×0.25×4×=
计算下面各题．
﹣
÷
÷
×
÷
直接写得数．
×16=
=
=
12÷
=
×
÷=
×
÷
×=
28×（ 
+
）=
= 1 
×
=
直接写得数．
1﹣90%= 1÷25%= 0.5+0.25= 42÷0.4= 1.25×32=
+
= 9﹣0.9= 42÷0.4=（+
）×24= 7÷
=
直接写出得数．
8×
=
÷12= 9+
=
﹣
=
3.25×8= 4.2÷2.1= 2.2+4.58= 0.34×400=
8×（0.6+1.9）= 0.9+99×0.9=