广东省茂名市信宜市七年级数学上册第二章有理数及其运算2.8有理数的除法同步作业(无答案)(新版)北师大版.doc

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广东省茂名市信宜市七年级数学上册第二章有理数及其运算2.8有理数的除法同步作业(无答案)(新版)北师大版.doc_第1页
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12.8 有理数的除法班别 姓名 基础题:1. 21的倒数是( )A B 21 C2 D22.下列运算错误的是( )A. 31(3)=3(3) B.5( 1)=5(2) C.8(2)=8+2 D.03=03.计算:(1) (40)(12) (2) (60)(3 5)(3) 61(2.5 ) (4)(12)(2)(3) (5) (2 71)( 45) (6) (10)(8)(0. 25)提高题:(1)如果 a0,b0,那么 ba_0;(3)如果 0,b0,那么 _0;(4)如果 0,b0,那么 _0。

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