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）=
直接写出得数．
180÷6= 12.25﹣0.5=
﹣0.5= 202= 23+177%= 2.5×4=
﹣
= 3π=
×
=
+
= 0.6÷
= 2÷1%=
350×0.02= 1﹣25%= 1+15%= 12﹣7.9=
×
=
﹣
=（
﹣）×24= 16×
=
131131÷131=
×
×0= 1÷
﹣÷1= 12.5×0.08=
0.9+99×0.9= 7.8×0.25×4=
﹣
+
= 0.52×100=
×8+8×
=
×21×
= 98﹣0.23﹣0.77=
+÷=
44÷
= 9300÷5÷6= 0÷
= 1997+1998+1999+6=