，求阴影部分的面积．（厘米）
相关试题
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﹣
﹣
﹣
= 
÷
= 6÷1%=
÷
= 24×0.5= 1÷
=
+
×17=
÷
= 
÷3= 6×
= 
﹣
=
= 
+
= 
×7= 
÷
=
÷2= 
﹣
= 
÷
= 20%+3=
﹣
= 
÷
= 
÷7= 
=
= 82=
×4÷
+
）= 9.9×99+9.9= 
π=
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