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nganhoang1223
2 năm trước
Trong thư viện của 1 trường, số sách toán chiếm 25% tổng số sách. Trong kì nghỉ hè, sau khi các em hs mượn 100 quyển sách toán và 250 quyển sách các môn khác thì số sách toán còn lại chiếm 20% tổng số sách còn lại. Tính số sách ban đầu của thư viện.
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Các câu hỏi liên quan

I. Write the correct form or tense of the verbs in brackets. 1. Just a minute, l can't hear you. l...................................................................................(listen) to the radio. 2. Susan often...............................(drive) to, the beach when the weather.....................................(be) nice. 3.It..........................................................................(snow) quite hard-perhaps we shouldn't go out tonight. 4.The student................................................................(not prepare) for the science exam at the moment. 5.How often...................................................................................................(you/go) to the gym to work out? 6.Every day his father often................................................(go) to work at seven o'clock by his motorbike. 7.The teacher ...................(read) the dialogue at the moment and we..................................(listen) to him. 8.There...............................................................................................(be) twenty classrooms in Hoa's school. 9.Lien ........................(not play) chess but she ........................(play) volleyball with her friends on sunday. 10.Where ..........................................(be) Mai?-She (play)............................................................in the garden. II. Use the given words to write the complete sentences. 1. Some creative student / do drawings / art club now. ................................................................................................................................................................................. 2.We / have / good teachers / they / help student / get interested / subject →............................................................................................................................................................................. 3. She / work / as / volunteer teacher / village and everyone / love / her → ............................................................................................................................................................................. 4. Please / close / your books / say / good bye / your classmates. →.............................................................................................................................................................................. 5.There / not / beautiful garden / left / Ba's house. → ............................................................................................................................................................................. 6. He / live / city center / uncle / aunt. →.............................................................................................................................................................................. 7. We / visit / milk farm / do / treasure hunt / field / tomorrow. → ............................................................................................................................................................................. 8. She / do / aerobics / three times / week → .............................................................................................................................................................................. 9. Every day she / often go / work / seven o'clock / her motorbike. →............................................................................................................................................................................... 10. She / know / lot / history / and / we / chat / it / hours. →..............................................................................................................................................................................

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