小数四则混合运算专项练习276题有答案ok.docx
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小数四则混合运算专项练习276题有答案ok
小数混合运算专项练习276题〔有答案〕
(1)0.11×1.8+8.2×0.11
(2)2.34×99+2.34
(3)5.4÷2.7×0.8
(4)132×101
(5)6.25÷1.25÷0.8
(6)2.5×16.
(7)6.33×101﹣6.33
(8)1.56×1.7+0.44×1.7
(9)1.8×[〔3.41﹣2.9〕÷0.03]
(10)0.125×32×2.5.
(11)1.258×18.5﹣0.258×18.5
(12)8.48÷0.8×0.9
(13)1.25×2.4
(14)5.85÷〔1.3+0.5〕×6.
(15)17.17﹣6.8﹣3.2﹣6.17
(16)5.4×[〔1.3+2.15〕÷0.2]
(17)8.4÷0.6+8.4÷0.4
(18)16.8×10.1
(19)10.9﹣0.9÷0.2+1.8
(20)1.25×3.2×0.25.
(21)1.36+4.85+2.64+6.15
(22)98.5÷2.5÷4
(23)5.4÷[2.5×〔3.7﹣2.9〕]
(24)0.8×〔4﹣3.68〕÷0.01
(25)83.7﹣12.83﹣0.17
(26)5.96+13×〔3.2﹣3.12〕
(27)4.32÷2.4×1.7;
(28)16.2×4.5+3.8×4.5;
(29)9.05﹣3.86﹣3.14;
(30)7.28+0.72÷0.9.
(31)4.32+5.43+6.68
(32)17.17﹣6.8﹣3.2
(33)5.29×9+5.29
(34)16.8×10.1
(35)2.74×9.5+5×0.274
(36)0.36+9.6÷3.2.
(37)3.75×25+6.25×25
(38)25.46﹣8.23﹣1.76
(39)2.9+7.1×10
(40)1.25×32×0.25.
(41)15.68﹣〔7.78﹣4.32〕﹣2.32
(42)0.25×3.2×1.25
(43)9.99×1.01
(44)4.63×1.4+46.3×0.86
(45)17.5÷0.8÷12.5
(46)0.9+9.9+99.9+999.9.
(47)2.9×99+2.9
(48)25×11.2×4
(49)23.25﹣6.75﹣3.25.
(50)125×3.2×2.5
(51)3.6×10.1
(52)5.8×2.7+0.58×73
(53)3.6+6.4×1.8
(54)〔1.48+3.02〕÷〔3.6×0.5〕
(55)〔36.7﹣4.9〕×101﹣31.8.
(56)6.33×101﹣6.33
(57)35.6﹣5×1.73
(58)1.6×55.4﹣55.4×0.6
(59)17.68÷5.2+2.7×1.5.
(60)1.08×0.8÷0.27
(61)102×0.45
(62)22.78÷1.25÷0.8
(63)0.34×101﹣0.34.
(64)0.125×32×2.5
(65)0.8×6.3﹣0.8×3.8
(66)504÷3.2×2.08
(67)〔20﹣0.8×9〕×5.7
(68)2.4×1.5+3.6÷1.5
(69)7.38﹣5.14+3.62﹣2.86
(70)0.12×1.8+8.2×0.12
(71)5.4÷[0.51÷〔1.2﹣1.03〕]
(72)[〔8.1﹣5.6〕×0.9﹣1.05]÷0.04.
(73)10.8﹣0.8÷〔0.35+0.05〕
(74)8×[1÷〔2.3﹣2.25〕]
(75)2.64×9.9+0.264
(76)4.52+0.61+1.39+6.48
(77)4.27﹣〔1.96﹣1.73〕
(78)〔294.4﹣19.2×6〕÷〔6+8〕
(79)12.5×0.76×0.4×8×2.5.
(80)4.98+8.02×2.5
(81)60.8﹣40.8÷2.5
(82)0.8×69.6×12.5
(83)4.98×99+4.9
(84)6.48÷3.2÷2.5
(85)1.2×7.6+7.6×6.8.
(86)〔9.4﹣5.8〕×2.07
(87)12.54﹣4.56﹣3.44﹣1.54
(88)〔9.36×5+9.36+9.36×2〕×1.25
(89)7.236÷0.18﹣14.3×0.02.
(90)9.6÷0.4×0.25
(91)29.7÷〔5.85÷0.65〕
(92)7.4×9.9
(93)3.84﹣2.7×0.64
(94)8.68﹣8.68÷0.56×0.5
(95)4.7×4.7+4.7+4.3×4.7.
(96)2.72÷[〔8.2﹣6.5〕×0.5];
(97)9.12+9.12×9﹣60.2;
(98)28.4÷0.4÷0.25;
(99)27.36﹣27.36÷7.6.
(100)3.25×0.45+6.75×0.45
(101)31.5﹣24.5÷3.5
(102)7.5×102
(103)6.3+3.7×2.8.
(104)2.15+8.73+1.27+7.85
(105)11.87﹣〔8.2+1.87〕
(106)5.42﹣3.87﹣1.13
(107)4.38﹣1.56+0.62﹣0.44
(108)0.4×270×2.
(109)〔40+1.25〕×8
(110)〔12.5﹣0.05〕×8
(111)2.6×8.5+8.5×7.4
(112)9.9×6.9﹣6.9×3.9
(113)5.6×99+5.6
(114)2.5×〔1.9+1.9+1.9+1.9〕
(115)7.2÷1.25÷8.
(116)52.4﹣〔15+0.6〕÷1.6
(117)9.87×99+9.87
(118)46.8÷0.9÷0.4
(119)5.5×17.3+6.7×5.5.
(120)99×4.2+4.2
(121)0.25×1.25×3.2
(122)6.4×14+15×6.4+6.4
(123)〔1.3+1.3×0.125×8〕÷〔80﹣77.4〕
(124)4×〔25+2.5+0.25〕÷111
(125)6.25÷〔〔17.2﹣3.6×4.5〕÷0.32〕
(126)28.4×99+28.4
(127)0.94×2.5﹣0.45
(128)4×0.8×12.5×2.5
(129)17.5÷0.25×17+13.
(130)10.1×87
(131)2.3+3.19÷〔22﹣19.8〕
(132)1.25×7.2.
(133)9.1﹣1.2÷6﹣6.24
(134)7.3+12.8﹣3.8×2.3
(135)〔5.36+7.64〕÷13×100
(136)7.575÷[〔5.63﹣1.88〕×0.2].
(137)7.5﹣〔5.5+1.24〕
(138)0.26+15.68+9.74+2.32
(139)13.26+9.55﹣3.26
(140)6.1+3.9﹣6.1+3.9.
(141)31.7÷0.63〔保存2位小数〕
(142)2.4×1.5+3.6÷1.5
(143)0.32×0.25+0.08÷4
(144)〔9.6+1.48÷3.7〕÷8
(145)5.8÷[4×〔1.34﹣0.14〕]
(146)5.4÷[0.51÷〔1.2﹣1.03〕].
(147)21.35﹣3.25﹣16.75
(148)33.02﹣〔148.4﹣90.85〕÷2.5
(149)32×2.5×0.125
(150)18.1+〔3﹣0.299÷0.23〕×1.
(151)67﹣〔2.98+0.67〕
(152)8×16﹣73.8×6
(153)〔45+14〕÷73+710.
(154)13.7×0.125×8
(155)0.8×[13﹣〔3.12+5.28〕]
(156)102×0.56
(157)1.53×1.7+0.47×1.7.
(158)5.18+0.73+0.82
(159)0.75×1.8÷1.5
(160)12.5×7.1×0.8
(161)6.12×99+6.12
(162)8.6÷0.86+8×0.35
(163)5.6×〔18.5﹣8.5÷0.5〕
(164)0.125×4.78×80
(165)2.8×3.6+1.4×2.8
(166)〔0.4+40〕×2.5
(167)78.7﹣17.7×3.6
(168)18÷[0.3×〔8﹣6.5〕]
(169)12.7+12.5+0.5.
(170)91÷2.6÷0.05=
(171)6.3×3.7+6.3×6.3=
(172)〔3.7+1.7×0.4〕÷2.5=
(173)7.28+3.2÷2.5=
(174)0.74+0.9×7.4=
(175)7.8÷0.125÷0.8=
(176)37.5÷[0.3×〔1.34﹣0.84〕]
(177)〔2.5+27.75÷1.5〕×1.6.
(178)6.21﹣3.8+2.2
(179)6.03+3.7+2.97
(180)17.43﹣6.57﹣2.43
(181)20.47﹣〔1.47+6.8〕
(182)13.26+4.71+3.47+5.29
(183)22.74+8.68﹣13.74.
(184)10÷0.2÷2.5
(185)64×4.5+3.6×45
(186)1.25×3.2×0.8
(187)14.5×102
(188)14.64+3.7×2.8
(189)8.4÷0.21÷0.5.
(190)0.125×9×8×0.3
(191)4.62÷5÷0.66
(192)5.78×2.3+5.78+5.78×6.7
(193)7.75×[20÷〔3.24﹣3.04〕].
(194)1.25×0.5×8×0.2
(195)0.97×9+0.97
(196)5.4÷[3×﹙3.8﹣2.9﹚].
(197)0.4×〔3.2﹣0.8〕÷0.15
(198)5.7+1.9×0.2÷7.6
(199)32.4×6.3+32.4×3.7
(200)18.2﹣10.6×〔0.9﹣0.75〕
(201)0.25×3.85×40
(202)1.46×3.5+3.5×4.54.
(203)7×12.5×0.8
(204)4.7×3.6+4.7×6.4
(205)1.45×[〔2.8+4.4〕÷2.4].
(206)4.2×〔6.18﹣3.03〕+6.3
(207)15.02﹣6.8﹣〔1.02+1.2〕
(208)0.6×[〔5﹣0.68〕÷1.2]
(209)2.7÷4+6.3×0.25
(210)〔6.02+2.8〕÷0.4﹣2.05
(211)3.08×3.5+6.2×3.08+3.08×0.3.
(212)2.3+3.91÷〔22﹣19.7〕
(213)21.6÷[64.8﹣〔48.6﹣2.7×2〕].
(214)93.6×3.6+1.4×3.6
(215)0.25×0.8×0.125×0.4
(216)2.7×1.5﹣2.7
(217)9.08+5.45+11.92+4.55
(218)1.25×30×1.2×0.8.
(219)0.6+0.94﹣0.208
(220)4.85×1.25×8
(221)〔64﹣22.4÷1.4〕×1.2
(222)18.3﹣6.25﹣3.75
(223)2.8×3.6+1.4×2.8
(224)6.6÷〔14.5﹣〔1.7+1.8〕〕
(225)0.25×9.87×4
(226)36.7×2.1+10.8
(227)8.45﹣0.45×0.1
(228)0.73×102
(229)7.8×5.6+2.3×4.4
(230)76.3×27﹣76.3×17.
(231)7.05×23.7+7.05×76.3.
(232)[〔7.6﹣5.2〕÷0.4+2.54]×32.
(233)17.68÷5.2+2.7×1.5
(234)35.6﹣5×1.73
(235)〔1.1﹣0.78〕×〔2.7﹣1.95〕
(236)1.3×0.75×4
(237)1.08÷1.8×1.2
(238)50.4×1.9﹣1.8
(239)0.82×0.25+1.18×0.25.
(240)8.5×[〔2.36+2.42〕÷0.25]
(241)3.9÷[〔1.3+0.6〕×6﹣3.6]
(242)4.25×6.3+3.7×4.25
(243)205×0.99
(244)25.6﹣7.49﹣2.51
(245)[2.5﹣〔6.8﹣4.9〕]×0.8.
(246)102×4.5
(247)3.4÷[〔1.2+0.5〕×5]
(248)8×〔20﹣1.25〕
(249)0.654+10.9×6.5
(250)22.7×1.25×0.8
(251)3.91×2.8+6.09×2.8.
(252)6.23+3.09=
(253)132.4﹣59.8=
(254)6.62×0.84=
(255)2.07÷0.023=
(256)[20.026﹣〔8.6+9.7〕×0.92]÷30.19.
(257)0.125×32×2.5
(258)0.8×6.3﹣0.8×3.8
(259)50.4÷3.2×2.08
(260)204÷〔3.4×0.5〕
(261)〔43.26+2.34〕÷7.5
(262)〔20﹣0.8×9〕×5.7.
(263)13.25﹣0.8+1.75﹣1.2;
(264)2.5×99+2.5;
(265)10.36+4.8﹣16.5÷5;
(266)12.5×2.4.
(267)38.78﹣19.59+41.22﹣30.41
(268)2.74×4.86+4.86×6.26+4.86
(269)0.08×〔12.5+2.5〕×0.1
(270)25.92+〔10.1﹣14.5×0.2〕
(271)0.487×12.5÷48.7
(272)〔8.16+2.09〕÷[〔10.3﹣9.3〕÷0.4].
(273)1.56×1.7+0.44×1.7
(274)12.5×〔7.2﹣1.9〕×0.8
(275)0.25×2010+20.10×75
(276)30.8÷[〔6.34﹣4.59〕×4].
参考答案:
〔1〕0.11×1.8+8.2×0.11,
=0.11×〔1.8+8.2〕,
=0.11×10,
=1.1;
〔2〕2.34×99+2.34,
=2.34×〔99+1〕,
=2.34×100,
=234;
〔3〕5.4÷2.7×0.8,
=2×0.8,
=1.6;
〔4〕132×101,
=132×〔100+1〕,
=132×100+132,
=13332;
〔5〕6.25÷1.25÷0.8,
=6.25÷〔1.25×0.8〕,
=6.25÷1,
=6.25;
〔6〕2.5×16,
=〔2.5×4〕×4,
=40
〔7〕6.33×101﹣6.33,
=6.33×〔101﹣1〕,
=6.33×100,
=633;
〔8〕1.56×1.7+0.44×1.7,
=1.7×〔1.56+0.44〕,
=1.7×2,
=3.4;
〔9〕1.8×[〔3.41﹣2.9〕÷0.03],
=1.8×[0.51÷0.03],
=1.8×17,
=30.6;
〔10〕0.125×32×2.5,
=〔0.125×8〕×〔4×2.5〕,
=1×10,
=10
〔11〕1.258×18.5﹣0.258×18.5,
=18.5×〔1.258﹣0.258〕,
=18.5×1,
=18.5;
〔12〕8.48÷0.8×0.9,
=10.6×0.9,
=9.54;
〔13〕1.25×2.4,
=1.25×8×0.3,
=10×0.3,
=3;
〔14〕5.85÷〔1.3+0.5〕×6,
=5.85÷1.8×6,
=3.25×6,
=19.5
〔15〕17.17﹣6.8﹣3.2﹣6.17
=〔17.17﹣6.17〕﹣〔6.8+3.2〕,
=11﹣10,
=1;
〔16〕5.4×[〔1.3+2.15〕÷0.2]
=5.4×[3.45÷0.2],
=5.4×17.25,
=93.15;
〔17〕8.4÷0.6+8.4÷0.4
=14+21
=35;
〔18〕16.8×10.1
=16.8×10+16.8×0.1,
=168+1.68,
=169.68;
〔19〕10.9﹣0.9÷0.2+1.8
=10.9﹣4.5+1.8,
=8.2;
〔20〕1.25×3.2×0.25
=〔1.25×0.8〕×〔4×0.25〕,
=1×1,
=1
〔21〕1.36+4.85+2.64+6.15,
=〔1.36+2.64〕+〔4.85+6.15〕,
=4+11,
=15;
〔22〕98.5÷2.5÷4,
=98.5÷〔2.5×4〕,
=98.5÷10,
=9.85;
〔23〕5.4÷[2.5×〔3.7﹣2.9〕],
=5.4÷[2.5×0.8],
=5.4÷2,
=2.7;
〔24〕0.8×〔4﹣3.68〕÷0.01,
=0.8×0.32÷0.01,
=0.256÷0.01,
=25.6;
〔25〕83.7﹣12.83﹣0.17,
=83.7﹣〔12.83+0.17〕,
=83.7﹣13,
=70.7;
〔26〕5.96+13×〔3.2﹣3.12〕,
=5.96+13×0.08,
=5.96+1.04,
=7.
〔27〕4.32÷2.4×1.7,
=1.8×1.7,
=3.06;
〔28〕16.2×4.5+3.8×4.5,
=〔16.2+3.8〕×4.5,
=20×4.5,
=90;
〔29〕9.05﹣3.86﹣3.14,
=9.05﹣〔3.86+3.14〕,
=9.05﹣7,
=2.05;
〔30〕7.28+0.72÷0.9,
=7.28+0.8,
=8.08
〔31〕4.32+5.43+6.68,
=4.32+6.68+5.43,
=11+5.43,
=16.43;
〔32〕17.17﹣6.8﹣3.2,
=17.17﹣〔6.8+3.2〕,
=17.17﹣10,
=7.17;
〔33〕5.29×9+5.29,
=5.29×〔9+1〕,
=5.29×10,
=52.9;
〔34〕16.8×10.1,
=16.8×10+16.8×0.1,
=168+1.68,
=169.68;
〔35〕2.74×9.5+5×0.274,
=2.74×9.5+0.5×2.74,
=2.74×〔9.5+0.5〕,
=2.74×10,
=27.4;
〔36〕0.36+9.6÷3.2,
=0.36+3,
=3.36
〔37〕3.75×25+6.25×25,
=25×〔3.75+6.25〕,
=25×10,
=250;
〔38〕25.46﹣8.23﹣1.76,
=25.46﹣〔8.23+1.76〕,
=25.46﹣9.99
=15.45;
〔39〕2.9+7.1×10,
=2.9+71,
=73.9;
〔40〕1.25×32×0.25
=〔1.25×8〕×〔4×0.25〕,
=10×1,
=1.
〔41〕15.68﹣〔7.78﹣4.32〕﹣2.32,
=15.68﹣7.78+4.32﹣2.32,
=〔15.68+4.32〕﹣〔7.78+2.32〕,
=20﹣10,
=10;
〔42〕0.25×3.2×1.25,
=0.25×4×0.8×1.25,
=〔0.25×4〕×〔0.8×1.25〕,
=1×1,
=1;
〔43〕9.99×1.01,
=〔10﹣0.01〕×1.01,
=10.1﹣0.0101,
=10.0899;
〔44〕4.63×1.4+46.3×0.86,
=46.3×0.14+46.3×0.86,
=46.3×〔0.14+0.86〕,
=46.3×1,
=46.3;
〔45〕17.5÷0.8÷12.5,
=17.5÷〔0.8×12.5〕,
=17.5÷1,
=17.5;
〔46〕0.9+9.9+99.9+999.9,
=1﹣0.1+10﹣0.1+100﹣0.1+1000﹣0.1,
=〔1+10+100+1000〕﹣〔0.1+0.1+0.1+0.1〕,
=1111﹣0.4,
=1110.6
〔47〕2.9×99+2.9
=〔99+1〕×2.9,
=100×2.9,
=290;
〔48〕25×11.2×4
=25×4×11.2,
=100×11.2,
=1120;
〔49〕23.25﹣6.75﹣3.25
=23.25﹣〔6.75+3.25〕,
=23.25﹣10,
=13.25
〔50〕125×3.2×2.5,
=125×8×0.4×2.5,
=〔125×8〕×〔0.4×2.5〕,
=1000×1,
=1000;
〔51〕3.6×10.1,
=3.6×〔10+0.1〕,
=3.6×10+3.6×0.1,
=36+0.36,
=36.36;
〔52〕5.8×2.7+0.58×73,
=5.8×2.7+5.8×7.3,
=5.8×〔2.7+7.3〕,
=5.8×10,
=58;
〔53〕3.6+6.4×1.8,
=3.6+11.52,
=15.12;
〔54〕〔1.48+3.02〕÷〔3.6×0.5〕,
=4.5÷1.8,
=2.5;
〔55〕〔36.7﹣4.9〕×101﹣31.8,
=31.8×101﹣31.8,
=31.8×〔101﹣1〕,
=31.8×100,
=3180
〔56〕6.33×101﹣6.33
=6.33×〔101﹣1〕,
=6.33×100,
=633;
〔57〕35.6﹣5×1.73,
=35.6﹣8.65,
=26.95;
〔58〕1.6×55.4﹣55.4×0.6,
=55.4×〔1.6﹣0.6〕,
=55.4×1,
=55.4;
〔59〕17.68÷5.2+2.7×1.5,
=3.4+4.05,
=7.45
〔60〕1.08×0.8÷0.27
=1.08÷0.27×0.8,
=4×0.8,
=3.2;
〔61〕102×0.45
=〔100+2〕×0.45,
=100×0.45+2×0.45,
=45+0.9,
=45.9;
〔62〕22.78÷1.25÷0.8
=22.78÷〔1.25×0.8〕,
=22.78÷1,
=22.78;
〔63〕0.34×101﹣0.34
=〔101﹣1〕×0.34,
=100×0.34,
=34
〔64〕0.125×32×2.5,
=〔0.125×8〕×〔4×2.5〕,
=1×10,
=10;
〔65〕0.8×6.3﹣0.8×3.8,
=0.8×〔6.3﹣3.8〕,
=0.8×2.5,
=2;
〔66〕50