101×38．
口算．
21%+5%
÷4 8π
+
125×8
×
+
﹣
÷
8÷64
×
7π
+
×
13÷26
﹣
67%﹣24% 99×5
×
×
÷
100÷25
×
×
×
÷
667+34
÷
÷
1263﹣163
÷
×
÷
÷
98%﹣55%
÷
×
15.7÷3.14
﹣
×
÷
÷
+
÷
×
÷
×
6.28÷π 0×
21÷5
×
÷
39×
3π 66×10
0÷875 1﹣
﹣
（﹣
）×12
×
+
×
3﹣
﹣
直接写出得数．
﹣
=
÷= 2﹣
= 6÷1%=
1﹣7÷9=
÷
= 24×0.5= 1÷
=
（
+）×0= 2
×17=
直接写出得数
÷
=
÷3= 6×
=
﹣
=
7÷
=
+
=
×7=
÷
=
口算．
÷2=
﹣
=
÷
= 20%+3=
20÷20%= 2×4÷2×4= 12×0×60%= 289÷57≈
口算．
﹣
=
÷
=
÷7=×
=
1﹣40%= 1÷37.5%= 2.1×
= 82=
×4÷×4= 20×（
+
）= 9.9×99+9.9=π+
π=