8/24-5/25 hhhhhhhhhhhhhhheeeeeeeeeeeeelllllllllllllllllllllllllppppppppppppppp mmmmmmmmmmmmmmmmmeeeeeeeeeeeeeeeee

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1. 8/24-5/25=200/600-120/600=80/600=2/15

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2. Đáp án:

   8/24-5/25

   =1/3-1/5

   =5/15-3/15

   =5-3/15

   =2/15

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