(山西专版)2018年秋七年级数学上册第一章有理数1.2有理数1.2.3相反数课时训练(无答案)(新版)新人教版.doc

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(山西专版)2018年秋七年级数学上册第一章有理数1.2有理数1.2.3相反数课时训练(无答案)(新版)新人教版.doc_第1页
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11.2.3 相反数基础练习1(+5)表示 的相反数,即(+5)= ;(5)表示 的相反数,即(5)= 。22 的相反数是 ; 75的相反数是;0 的相反数是 。3化简下列各数:(68)= (+0.75)= ( 53)= (+3.8)= +(3)= +(+6 )= 4,下列说法中正确的是( )A、正数和负数互为相反数 B、任何一个数的相反数都与它本身不相同C、任何一个数都有它的相反数 D、数轴上原点两旁的两个点表示的数互为相反数拓展提高1(3)的相反数是 。2已知数轴上 A、B 表示 的数互为相反数,并且两点间的距离是 6,点 A 在点 B 的左边,则点 A、B 表示的数分别是 。3已知 a 与 b 互为相反数,b 与 c 互为相反数,且 c=6,则 a= 。4一个数 a 的相反数是非负数,那么这个数 a 与 0 的大小关系是 a 0.5数轴上 A 点表示3,B、C 两点表示的数互为相反数,且点 B 到点 A 的距离是 2,则点C 表示的数应该是 。6下列结论正确的有( )任何数都不等于它的相反数;符号相反的数互为相反数 ;表示互为相反数的两个数的点到原点的距离相等;若有理数 a,b 互为相反数,那么 a+b=0;若有理数 a,b 互为相反数,则它们一定异号。A 、2 个 B、3 个 C、4 个 D、5 个7,如果 a=a,那么表示 a 的点在数轴上的什么位置?

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