过点A画已知直线的平行线与垂线．
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=
直接写得数2×3.14×8= = = 25%+=（1﹣）×（﹣）= = 1.75﹣（0.75+）= 3.14×9=
口算．0.48÷0.3= 18×1%= 2.5×40= 1﹣= ÷=
1.25÷2.5= 36×（+）= 9÷9=5×÷×5= 8﹣8÷9= ÷7=
直接写出得数．3.2÷0.01= ×= ÷= 5.6+3.99=10×= 4××= ÷= 6.4×0.5=
= 
÷12= 9+
= 
﹣
== ÷12= 9+= ﹣=
= 
= 25%+
=
）×（
﹣
）= 
= 1.75﹣（0.75+
）= 3.14×9=
= 
÷
=
+
）= 9
÷9=
÷
÷7=
×
= 
÷
= 5.6+3.99=
= 4×
×
= 
÷
= 6.4×0.5=
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