11．直接写出得数．
0 158741 158749 158755 158759 158765 158767 158771 158777 158779 158785 158791 158795 158797 158801 158807 158809 158815 158819 158821 158825 158827 158831 158833 158835 158836 158837 158839 158840 158841 158843 158845 158849 158851 158855 158857 158861 158867 158869 158875 158879 158881 158885 158891 158897 158899 158905 158909 158911 158917 158921 158927 158935 199269
| 150+50= | 10-0.5= | 1.2÷0.3= | 2.5×5×4= |
| $\frac{2}{3}$×0.75= | $\frac{1}{2}$+$\frac{1}{3}$= | $\frac{2}{5}$÷0.8= | 1÷$\frac{1}{2}$-$\frac{1}{2}$= |
如图是一个长3米、宽与高都是2米的长方体．将它挖掉一个棱长l米的小正方体后，它的表面积是34平方米．