12．直接写出得数．
| 18×5= | 125×8= | 25×9×4= | 1200×40= | 17×3= |
| 13×20= | 80×50= | 125×13×8= | 102×40= | 150×6= |
9．直接写出得数．
0 161001 161009 161015 161019 161025 161027 161031 161037 161039 161045 161051 161055 161057 161061 161067 161069 161075 161079 161081 161085 161087 161091 161093 161095 161096 161097 161099 161100 161101 161103 161105 161109 161111 161115 161117 161121 161127 161129 161135 161139 161141 161145 161151 161157 161159 161165 161169 161171 161177 161181 161187 161195 199269
| 10÷4= | 12.9÷0.3= | 1.3÷0.13= | 0.6÷1.2= | 0.3÷3= |
| 0.32÷0.04= | 9.6÷6= | 3.6÷0.4= | 3.98÷1= | 1.6÷0.8= |