直接写出得数：×2= 6×= ×= ×1=×= += ×= ﹣=
直接写得数．==×30=÷5= 2÷= 470﹣407= 13×50= 8.64﹣5.04= 500÷25= 4.57+5.43=
直接写出得数．=×4= 0.4÷= 0×1= 12×= 5﹣= 4÷==
直接写得数．+= 20×= 0.36÷0.6=﹣= ÷2= 3.5﹣3.05=÷= 7×（+）=
直接写出得数．+=﹣= 12×÷9=÷3×75=×14= 20÷=×= 0×3=÷=÷=
直接写得数 502﹣197= 8.01﹣2.1= 2.5×40= 0.33= 5.2÷0.125÷8===== 12.5÷（10%÷10）=
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×2= 6×
= 
×
= 
×1=
×
= 
+
= 
×
= 
﹣
=
=
=
×30=
÷5= 2÷
=
=
×4= 0.4÷
= 0×1
=
= 5﹣
= 4÷
=
=
+
= 20×
= 0.36÷0.6=
﹣
= 
÷2=
÷
= 7×（
+
）=
+
=
﹣
= 12×
÷9=
÷3×75=
×14=
=
×
= 0×3=
÷
÷
=
=
=
= 12.5÷（10%÷10）=