[数学人教版七年级下册]七年级数学下册9.1不等式练习题人教版 ●方法点拨 [例1]判断下列各式哪些是等式、哪些是不等式、哪些既不是等式也不是不等式. ①x+y②3x>7③5=2x+3④x2≥0⑤2x-3y=1⑥52 解...+阅读

Eric: Hi, David. How are you? Are you OK? David: No, I'm not. Eric: What's wrong? David: It's Tuesday. Eric: So? David: I have two math classes on Tuesday. Eric: You don't like math? David: No. It's so difficult! My father says it's interesting. But I don't think so. Eric: So what's your favorite subject? David: Chinese. It's difficult but interesting! Eric: When is your Chinese class? David: It's on Monday, Wednesday, Thursday and Friday. I have to go now! I have math, history and science this morning. Eric: OK, see you at music class. David: Bye!

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