(山西专版)2018年秋七年级数学上册第一章有理数1.4有理数的乘除法1.4.1有理数的乘法(三)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1.4有理数的乘除法1.4.1有理数的乘法(三)课时训练(无答案)(新版)新人教版.doc_第1页
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11.4.1 有理数的乘法(三)基础练习1. 计算:( 79- 56+ 34-18)(-36) 2. 计算:(1) (-0.25)0.5(-4 27)4;(2) (-47.65)2 61+(-37.15) (-2 61)+10.5(-7 51) 3运用运算 律填空(1)-2(-3 )=(-3)(_) (2)(- 3)2( -4)=(- 3) (_) (_)(3) (-5) (-2)+(-3)=(-5)(_)+(_)(-3) 拓展提高4计算(1) (-4)(-18.36)2.5; (2 ) (- 7)0.125(- 213)(-8) ;(3) (- 2+ - 14-5)(-20) ; (4)- 56(1 2-2 -0.6) ;(5) (- 9)(-18)+(- 1)(-3)2 5;(6)(-2)(-4)+(-5)- 3-(-2)(-3)5用简便运算方法计算(1)(48)25-8125;(2)-100 8-0.12535.5+14.5(-12.5%)

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