Số đếm 11 20 11 12 13 14 15 eleven twelve thirteen fourteen fifteen 16 17 18 19 20 sixteen seventeen eighteen nineteen twentySố đếm 11 20 11 12 13 14 15 eleven twelve thirteen fourteen fifteen 16 17 18 19 20 sixteen seventeen eighteen nineteen twentySố đếm 11 20 11 12 13 14 15 eleven twelve thirteen fourteen fifteen 16 17 18 19 20 sixteen seventeen eighteen nineteen twenty