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1、练习一(有理数加法)一、直接写出答案:(8)(9)(17)2145(23)(45)23(39)(45)(28)37(13)0(2.8)2.8 (0.9)1.53221二、计算:31(28)2869(3)40(32)(8)(301)125301(75)(26)5216(72)3620112420131215432217110411421.2157218515723.练习二(有理数减法)一、直接写出答案:8(7)(3)20(23)(6)0(39)(5)7.2(4.8)(6)6 3.8(4.2)415213323212二、计算:(36)(21)(18)16(32)(12)40(15)3015(15)
2、(7)(40)(19)(32)28 24321625731212127471102111421.2157518515723.练习三(有理数加减混合运算)一、直接写出答案:104.3(25.8)10.8 535483854321 4.5 2113423 10.1109二、计算:(7)24(4)3 12(8)(11)95.3(2.3)(3.2)435021.325253825751827256431.414331321216721711254练习四(有理数加减混合运算)计算:3.5(2.5)(15)83872132735371522154322183318132413411235336841273
3、10433.217524150.21583125332612525.145253735374149练习五(有理数加减混合运算)计算:17(+65)(18)20 4.7(8.9)7.5(6)743728117111131114353522548311383851133124321421331121250.726565756125065213.25032118134131250.练习六(有理数乘法)一、直接写出答案:36(7)(9)5885515(6)(8)8304932 60.2531025814二、计算:36.4 18.50(26.7)215107(100)(1)(3)(-0.5)313212
4、1582173165185443322176879810940.练习七(有理数乘法)计算:(85)(25)(4)3015110972524111413197111987534265.82014251.361874365975311351355313554720945212957201253.练习八(有理数乘法)计算:(2)(7)(5)(-71)5614381174361711108496232136(6)(25)(0.04)040311843.128798687432124(-125)(-25)(-5)(+2)(-4)(-8)3211237443750237.练习九(有理数乘法)一、直接写出答
5、案:8(4)(8)(4)581413(36)(12)(0.85)0.17 3454 2.25(-1.5)31035810二、计算:(10)(8)(0.25)384121.6416116212124113214374215323211344133385244361832411练习十(有理数乘除混合运算)计算:(10)51(2.5)(32)9425065.1212161418116159542744312816944981922949546114541213312481163125413231234317503.练习十一(有理数乘方)一、直接写出答案:52(3)2(0.2)2(2)42813412
6、4(1)20252324二、计算:;nnn为有理数20051221113223242051.2252411222432211323233222313100101212练习十二(有理数的混合运算)一、直接写出答案:(4)2(5)3 3(3)2 (2)(3)233442325232(4)3二、计算:523144122412732232942232328252.4943321415307316631223225833133222218165623练习十三(有理数的混合运算)计算:32(2)3325;23405221750.364316597222111361194532533265331653765
7、3471000405310790.2233312111(910)(1011)(1112)(108109)3124324123223练习十四(有理数的混合运算)计算:234356312112113243428103612723221273712125239322113313611273543752502332.261524114132413112222133213423练习十五(有理数的混合运算)计算:3221433123262322323806023.3222322014555282.222542053.415803132922.225252345081323132501.200332222133130213.练习十六(有理数的混合运算)计算:4511321315113428102225258482333221452535213324824362163232232311501.2365321701.73233522练习十七(有理数的混合运算)计算:2382322210024812163223261502.8193024273222232311501.2232311501.25522323220042004424250131515131.