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1.So sánh các phân số : 4/5, 8/7, 8/9, 12/11 2. Không quy đồng tử số và mẫu số, hãy so sánh các phân số sau: 4/5 và 3/2; 5/9 và 11/24; 1 3/27 và 17/23; 14/15 và 15/16; 96/95 và 97/96 3.Hãy viết các phân số 1/2 và 1/3 dưới dạng: a. Tổng của hai phân số có tử số đều bằng 1. b. Hiêu của hai phân số có tử số đều bằng 1.
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