用竖式计算．4.5÷0.7（得数保留三位小数） 22.25÷l2.5（用乘法验算）30.3÷3.3 5.58÷6.2（得数保留两位小数）
直接写出得数×= 1﹣= ÷= （7+）×8=0.1÷10%= ×6= a﹣a= 12×（﹣+）=
计算．+= ﹣= ×= ÷=1.25××8= 1.2×= 20÷= （﹣）×30=﹣÷2= 99×÷99×=
直接写出复数．×= 1÷= ÷8= 7×= ×12=×= ﹣= += ÷= 14÷=
直接写出得数．0.56+0.25= ﹣（﹣）= 0÷= （+）×6=+= ×= 8÷= 1+8%=
直接写结果﹣= 570÷ ×20= +3.5=11﹣﹣= ×= 1÷= 10﹣=÷= 19.9+19.9×99=
×
= 1﹣
= 
÷
= （7+
）×8=
×6= a﹣
a= 12×（
﹣
+
）=
+
= 
﹣
= 
×
= 
÷
=
×8= 1.2×
= 20÷
= （
﹣
）×30=
﹣
÷99×
×
= 1÷
= 
÷8= 7×
= 
×12=
×
= 
﹣
= 
+
÷
= 14÷
=
﹣（
﹣
）= 0÷
= （
）×6=
+
= 
×
= 8÷
﹣
= 570÷
×20= 
﹣
= 
×
= 1÷
= 10﹣
=
÷
= 19.9+19.9×99=
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