小数四则混合运算专项练习题有答案ok.docx

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小数四则混合运算专项练习题有答案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(保留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

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