(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(二)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(二)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(二)基础练习1.计算:( 79- 56+ 34-18)(-36) 2 .计算:(1) (-0.2 5)0.5(-4 27)4;3运用运算律填空(1)-2(-3)=(- 3)(_) (2)(-3)2 (-4)=(-3)( _)(_) (3) (-5)(-2)+(-3)=(-5)(_)+(_)(-3) 4计算(1) (-4)(-18.36)2.5; (2) (- 37)0.125(-2 13)(-8) ;(3) (- 2+ - 4-5)(-20) ; (4)- 56(12-2 2-0.6) ;(5) (- 9)(-18)+ (- 1) (-3)2 15;拓展提高计算(48)25-812 5;-10018-0.12535.5+14.5(-12.5%)

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