Câu 1. Phân số 15/12 được rút gọn bằng phân số: A. 5/4 B.5/3 C. 5/2 D. 5/1 Câu 2. Trong các phân số sau phân số nào là phân số tối giản A. 4/6 B. 14/6 C. 4/16 D. 41/6 Câu 3. 35 phút được viết theo đơn vị giờ là: A. 5/12giờ B.7/12giờ C. 9/12giờ D.-5/12giờ Câu 4. Trong các phân số sau phân số nào bằng phân số -2/3 A.-4/-6 B.8/12 C. 8/-12 D.18/27 Câu 5. Trong các phân số sau phân số nào không bằng phân số 5/2 A. -10/4 B.10/4 C.-15/-6 D.25/10 Câu 6. 480cm2 được viết theo đơn vị m2 là: A.48/10m2 B.48/100m2 C.6/1250m2 D.6/125m2

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