(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1.4.2有理数的除法(二)课时训练(无答案)(新版)新人教版.doc

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11.4.2 有理数的除法(二)基础练习1.计算:(1) (-40)(-8) ; (2) (-5.2)3 325.2.计算:(1) (-1)(- 310); (2) (-0.33)(+ 13)(-9);(3) (-9.18)(0.28)(-10.71); ( 4)63(-1 9)+(- 7)(-0.9).3.计 算:(- 6)(9- 27+ 3-14).4.计算:(1)293 1;(2)(- 35)(-3 2)(-1 4)3;(3) (+ 7)-(- )-(+5)(- 10).拓展提高5.混合运算:(1)619(1 2) 94; (2)(81)2 14 9(16);(3)(2 3)( 8); (4)1.30(5.7 45 ).6.已知 m除以 5余 1,n 除以 5余 4,如果 3mn,求 3m-n除以 5的余数.7.计算:(-317158+1365 198)(2 5+1-16).8.计算:(-191 91 99 898+989 8981 919)(- 2+3.14) .9.有一种“算 24”的游戏,其规则是:任取四个 113 之间的自然数,将这四个数(每数只能用一次)进行加减乘除混合运算,其结果为 24.例如 2,3,4,5 作运算.(5+32)4=24,现有四个有理数 3、4、6、10,运用以上规则写出等于 24的算式,你能写出几种算法?

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