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7 , tìm x biét X +78 x X + 25 x X- X x 4 = 78,6 + 121,4 8, tính bằng cách thuận tiện nhất 20,18 x 35 + 20,18 x 45 +20,18 x 19 +20,18 x 20,18 các bạn giúp mình 3 bài này nha mình cảm ơn
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Roger federer is probably the best and most famous tennis player in the world today. He was born on August 8th, 1981 in Basle, Switzerland. His parents encouraged him to star playing tennis when he was eight years old. He won his first Wimbledon title, the Wimbledon Junior, when he was sixteen. Over the next few years, he played all over the world. In Australia he played for his country in the 2000 Olympic Games. Then in 2003 he began to show how good he was. He started the year by winning two tournaments in a row, in Dubai and Marseiles. He also won his first Grand Slam title at the Wimbledon Championships. In 2004 he won three out of four Grand Slam titles. When he is not playing tennis, Federer is busy with his special project, the Roger Federer Foundation, which helps disadvantaged children. 1, When did Roger federer begin to show how good he was? 2, Did he win the Wimbledon Junior when he was sixteen ? 3, Where did he play for his country in the 2000 Olympic games?

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