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Bài 2: Rút gọn rồi quy đồng các phân số sau: a) 20/45 ; 14/-35 và -32/44 b)-15/90 ; 120/600 ; -75/150 c) 54/-90 ; -180/288 ; 60/-135 d) 3.4+3.11/9.2 +3 và 8.3-3.2/4.7-2.6 Bài 3: Tìm x ∈ Z, biết. a) x/5=x+6/15 b) x+10/27=x/9 c) x+16/35=x/7 Bài 4: Tìm phân số có mẫu bằng 5, biết rằng khi cộng tử với 8, nhân mẫu với 3 thì giá trị của phân đó không thay đổi.
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IV. Chọn một trong các từ thích hợp sau để điền vào chỗ trống: Although, though, eventhough, despite, inspite of 1. The children slept deeply ________________ the noise. 2. Jane rarely sees Alan ________________ they are neighbors. 3. Kate did not do well in the exam ________________ working very hard. 4. ________________ I was very hungry, I couldn’t eat. 5. ________________ the difficulty, they managed to solve the math problem. 6. Liza never talked to him ________________ she loved him. 7. ________________ it was cold, Marie didn’t put on her coat. 8. Clare did the work ________________ being ill. 9. ________________ the weather was bad, we had a good time. 10. ________________ all our hard work, a lot of things went wrong. 11. ________________ we had planned everything carefully, a lot of things went wrong. 12. I went to work the next day ________________ I was still feeling ill. 13. She accepted the job ________________ the low salary. 14. I managed to sleep ________________ the hotel was noisy. 15. He runs fast ________________ his old age. 16. ________________ she is beautiful, everybody hates her.

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