Bài tập trên mail đã gửi cho PHHS có thể mở xem thực hiện:
1/ Link bai tap khoi 9:
https://drive.google.com/open?id=1IMenh1NnJx18jG5B60Yxkk31lgCVVqDs
2/ Link bai tap khoi 8:
https://drive.google.com/open?id=1kfQtYjRPnco82LysGOra7InFkrLUkK-Y
3/ Link bai tap khoi 7:
https://drive.google.com/open?id=1M91xaRrQTtrrSQHWRseBbilC2P_ecLs2
4/ Link bai tap khoi 6:
https://drive.google.com/open?id=1SMPRgTwoPSkJXYj1W_erpHDMpZ0bOgrZ