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bài1: viết gọn các tích sau bằng cách dùng lũy thừa a) 7.7.7.7 b) 3.5.15.15 c) 2.2.5.5.2 d) 10000.10.10 bài 2 : viết gọn bằng cách dùng lũy thừa a) a.a.a.b.b b) x mũ 7 . x+y.y c) m.m.m.m.m-n.n.n+q.q.q.q
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I. Fill in each blank with ONE suitable word to complete the following passage (1 pt.) Do you play a (1) m_____ instrument? In many schools, music is an (2) o _____ subject, but I think it’s a really useful one. One reason is that it encourages you to be (3) a_____. Playing any instrument trains you to think (4) c_____. In fact, some people think that studying music develops your (5) m_______ in lots of other ways, too, improving your problem-solving skills and self-disciplines. It does take a lot of work and (6) e______ to learn an instrument, though. It’s essential to practice a lot if you want to be truly (7) s________. One of the most difficult things I’ve ever done was when I had to give a (8) p____ in front of lots of people. I (9) r_________ every day for weeks. I was really scared before I went on stage, but when I finished and everyone was clapping, the sense of achievement I felt was amazing. It was an absolutely (10) m_______ experience!

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