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Nguyễn Hải Minh
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2024-03-04 20:43:47
coi giá ban đầu là 100 % thì 4 500 000 tương đương:
100 % - 10 % = 90 %
Nếu giảm giá 20% thì chiếc ti vi đó đáng giá: 4500000 : 90 x ( 100 - 20 ) = 4 000 000 ( đồng )
đáp số : 4 000 000
2024-02-28 21:16:30
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