用纸剪成一个半径是6厘米的半圆和一个半径是3厘米的半圆，放在桌面上（如图）．覆盖桌面的面积是59.96平方厘米．求图中阴影部分的面积．
直接写出得数．=== 10﹣8.9= （）×24= 42÷= 2.7×= 5.2÷10%=
直接写出得数． ﹣= 8.73+27=×3=×= 0.3×= 5﹣= 8.4÷0.7= 0.75÷=
直接写得数．×=+= 2.78+2.12= 1.25×8= 6÷=﹣=÷= 81÷0.3=
直接写得数．×45=+= 6.3÷0.01= 2.5+1.25= 6﹣﹣=÷= 390×0.02= 510﹣240= 0.13= 10×÷10×=
直接写出得数﹣=+=×=÷=×= 1﹣=
=
=
= 10﹣8.9=
）×24= 42÷
= 2.7×
= 5.2÷10%=
﹣
= 8.73+27=
×3=
×
=
= 5﹣
= 8.4÷0.7= 0.75÷
=
×
=
+
= 2.78+2.12= 1.25×8=
=
﹣
=
÷
= 81÷0.3=
×45=
+
= 6.3÷0.01= 2.5+1.25= 6﹣
﹣
=
÷
= 390×0.02= 510﹣240= 0.13= 10×
÷10×
=
﹣
=
+
=
×
=
÷
=
×
= 1﹣
=
粤公网安备 44130202000953号