2 câu trả lời
9 + 1999 + 2 + 18888 + 3 + 1777
= (1777 + 3) + (18888 + 2) + (9 + 1999)
= 1780 + 18890 + 2008
= 20670 + 2008
= 22678
9 + 1999 + 2 + 18888 + 3 + 1777
= (1777 + 3) + (18888 + 2) + (9 + 1999)
= 1780 + 18890 + 2008
= 20670 + 2008
= 22678