画出如图的对称轴．
2.25×4= 1.01﹣0.91= 1÷0.01= ÷= ÷5.25=+6.25= 0.74×100= 742+258= 7×÷7×= 10﹣3.2﹣5.8=
直接写出得数．= = ÷2= 4÷= ﹣=÷= 4﹣﹣= 0÷+= ×0+9=
×14= 20÷= 1﹣÷= ﹣﹣= 2.4÷40%=﹣×0= 1÷﹣÷1= 6×÷6×=
看谁算得快．×= ÷= ×8= +=18×2%= 1﹣= 3.5÷18= 137﹣63﹣37=205﹣199+95= 8.8+1.2= 8π≈ 0.33=
直接写结果÷8= ÷= 1÷= （+）×12=××0= 2÷= ×3= ××19=
÷
= 
÷5.25=
+6.25= 0.74×100= 742+258= 7×
÷7×
= 10﹣3.2﹣5.8=÷= ÷5.25=+6.25= 0.74×100= 742+258= 7×÷7×= 10﹣3.2﹣5.8=
= 
= 
÷2= 4÷
= 
﹣
=
÷
= 4﹣
﹣
= 0÷
+
×0+9=
×14= 20÷
= 1﹣
÷
= 
﹣
﹣
= 2.4÷40%=
﹣
﹣
÷6×
×
= 
÷
= 
×8= 
+
=
÷8= 
÷
= 1÷
= （
+
）×12=
×
×0= 2÷
×3= 
×
×19=
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