Điền dấu >, <, = 11 – 6 .......... 11 -5 11 – 8 ........ 11 – 5 11 – 4 .......... 11 – 9 11 – 7 ........ 11 – 8 11 – 8 .......... 11 – 9 11 – 6 .......... 11 - 7