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hello ai ghé thăm nha. Ai sang đều phải chấp hành việc kết bạn với tôi:)))) hehe. Đùa thôi nhưng ai muốn làm bạn của tôi thì ..... :((
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2022-05-08 15:50:19
2 ngày dùng hết 1/3+1/4=7/12 bể nước
số nước còn lại là 1-7/12=5/12
số giờ để bể đầy nước là: 5/12:1/12 = 5 giờ
Đáp số : 5 giờ
2022-05-08 15:49:58
ezzzzzzzzzzzzzzzzzzzzzzzzzzz
2022-04-04 18:30:58
2022-04-04 18:30:58
2022-04-04 18:30:08
2022-04-04 18:27:01
2022-04-04 18:25:48
2022-04-04 18:25:48
2022-04-04 18:25:48
2022-02-27 18:37:58