13．口算
0 154781 154789 154795 154799 154805 154807 154811 154817 154819 154825 154831 154835 154837 154841 154847 154849 154855 154859 154861 154865 154867 154871 154873 154875 154876 154877 154879 154880 154881 154883 154885 154889 154891 154895 154897 154901 154907 154909 154915 154919 154921 154925 154931 154937 154939 154945 154949 154951 154957 154961 154967 154975 199269
| 300÷6= | 240÷2= | 40×2= | 24×20= |
| 160÷8= | 60×30= | 15×60= | 25×80= |
| 150×10= | 540÷9= | 210÷7= | 630÷9= |
| 160÷1= | 43×0= | 0÷9= | 8÷8= |
根据统计图，回答下面问题．某饲养场养的鸡、鸭、鹅情况统计图，如右图：