TN 15ph "Rút gọn biểu thức " ( 8 đề & đáp án )


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/56&./07 &.'89:'
 Nội dung đề: 001
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/56&./07 &.'89:'
 Nội dung đề: 002
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/56&./07 &.'89:'
 Nội dung đề: 003
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