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Phạm Duy Hưng
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0
2023-12-17 21:08:18
kết quả:
a.53680
b.406380
c.1128400
2023-12-17 21:01:58
0,1 + 0,2 + 0,3 + ... + 0,8 + 0,9
=(0,1 + 0,9) + (0,2 + 0,8) + ... + 0,5
=1 + 1 + 1 + 1 + 0,5
=4 + 0,5
=4,5
Học tốt nha(Mình không hiểu tại sao tôi lớp 4 mà giải được câu hỏi lớp 5????)