口算下面各题．1.5÷0.5= 5.02÷0.01= 1.25÷0.125=0.02÷0.4= 5.1÷1.7= 0.66÷0.3=49÷0.07= 12.1÷0.11=
20×=÷=
24×= 15÷=×=÷= 1÷25%=+= 3×÷3×50%=（1﹣1%）÷99%=
直接写得数×8× 81÷÷ 63÷×× 3×÷3× 36×25%
直接写得数．==== 8×3.14== 1÷75%==
0×=4= 21×==×3×8= 1=﹣== 2.5×=（）×20=
=
÷
=
= 15÷
=
×
=
÷
=
+
÷3×50%=（1﹣1%）÷99%=
×8
×
81÷
÷
×
×
3×
÷3×
=
=
=
=
= 1÷75%=
=
=
4= 21×
=
=
×3×8=
=
﹣
=
= 2.5×
=（
）×20=
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