2018秋七年级数学上册第二章整式的加减2.1整式第2课时整式(二)(课堂小测本)课件(新版)新人教版.ppt

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1、第二章 整式的加减,2.1 整式,第2课时 整式(二),易错核心知识循环练 1. (10分) 和它的相反数之间的整数有( )A. 3个 B.4个 C. 5个 D. 6个 2. (10分)有理数a,b在数轴上的位置如图K2-1-1所示,以下说法正确的是( )A. a-b0 B. C. ab0 D. b-a,C,课堂小测本,D,3. (10分)在2 ,15,9, 0 , 这五个有理数中,最大的数是_,最小的数是_ . 4. (10分)计算: (-10)+8(-2)-(-4)(-3)=_.,课堂小测本,15,-38,5. (10分)填表:,课堂小测本,-1.2,2,-0.3,-2,1,2,2,3,2

2、3,核心知识当堂测 1. (10分)多项式1+2xy-3xy2的次数为( ) A. 1 B. 2 C. 3 D. 5 2. (10分)组成多项式2x2-x-3的单项式是下列几组中的( ) A. 2x2,x,3 B. 2x2,-x,-3 C. 2x2,x,-3 D. 2x2,-x,3,C,课堂小测本,B,3. (10分)如果一个多项式的次数是5,那么这个多项式的任何一项的次数满足( ) A. 都小于5 B. 都大于5 C. 都不小于5 D. 都不大于5 4. (10分)如果关于x的多项式x4-(a-1)x3+5x2-(b+3)x-1不含x3项和x项,则a=_,b=_.,课堂小测本,D,1,-3,5. (10分)填表:,课堂小测本,-5,-2x2y,-3x, 2y,-5,x5,-2x3y3, 3x,27,3,6,2,27,

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