2018秋七年级数学上册第一章有理数1.2有理数第5课时绝对值(二)(课堂小测本)课件(新版)新人教版.ppt

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1、第一章 有理数,1.2 有理数,第5课时 绝对值(二),易错核心知识循环练 1. (10分)在下列各数-2,3,-(-0.75),-5.4, ,-3,0,4中,属于整数的有_个,属于正数的有_个. ( ) A. 6,4 B. 5,5 C. 4,3 D. 3,6 2. (10分)若数轴上表示-1和3的两点分别是点A和点B,则点A和点B之间的距离是( ) A. -4 B. -2 C. 2 D. 4,A,课堂小测本,D,3. (10分)在数轴上,表示_的点与表示-4和2的点的距离相等. 4. (10分)若a与3互为相反数,则a=_. 5. (10分)化简:,课堂小测本,-1,-3,课堂小测本,核心知

2、识当堂测 1. (10分)下列说法正确的是( ) A. 一个数的绝对值一定比0大 B. 一个数的相反数一定比它本身小 C. 绝对值等于它本身的数一定是正数 D. 最小的正整数是1,D,课堂小测本,2. (10分)在数轴上,原点左边的点所表示的数是( ) A. 正数 B. 负数 C. 非负数 D. 非正数 3. (10分)有理数m,n在数轴上的位置如图K1-2-4所示,则下列判断正确的是( )A. m0 B. m1 C. n-1 D. n-1,课堂小测本,B,D,4. (10分)比较大小,用“”或“”填空: 4_0;-7_0;-3_5;-9_-5; -(-7)_-2; _ 5. (10分)在数轴上表示下列各数,并比较它们的大小.,课堂小测本,课堂小测本,

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