\[{9 \over {11}}...{{12} \over {11}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{13} \over {15}}...{9 \over {15}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{48} \over {63}}...{{32} \over {42}}\]
1. Điền dấu [>,=,,=,{3 \over 7}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{8 \over {15}}{{11} \over {15}}\]
\[{9 \over {11}}{9 \over {15}}\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{48} \over {63}}={{32} \over {42}}\]
2.
\[{9 \over 4}>1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{18} \over {15}}>1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{17} \over {17}}=1\]
\[{8 \over 5}>1\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,{{13} \over {15}}