小数混合运算专项练习

小数混合运算专项练习276题（有答案）

(1)XX0.11(8)XX

(2)X99+2.34(9)X-2.9)4-0.03]

(3)X(10)X32X2.5.

(4)132X101(11)X-X18.5

(5)4--?0.8(12)-?X

(6)X16.(13)X2.4

(7)X101-6.33(14)4-(1.3+0.5)X6.

(15)--6.17(23)4-X-2.9)]

(16)X[(1.3+2.15)4-0.2](24)X(4-3.68)4-0.01

(17)K(25)--0.17

(18)X10.1(26)5.96+13X-3.12)

(19)-4-0.2+1.8(27)4-XL7；

(20)XXO.25.(28)XX4.5；

(21)1.36+4.85+2.64+6.15(29)--3.14；

(22)4-4-4(30)小

(31)4.32+5.43+6.68(39)X10

(32)--3.2(40)X32X0.25.

(33)X(41)--4.32)-2.32

(34)X10.1(42)XX1.25

(35)X9.5+5X0,274(43)X

(36)+3.2.(44)XX0.86

(37)XX25(45)4-4-12.5

(38)--1.76(46)0.9+9.9+99.9+999.9.

(47)X99+2.9(55)-4.9)X101-31.8.

(48)25XX4(56)X101-6.33

(49)--3.25.(57)-5X1.73

(50)125XX2.5(58)X-X0.6

(51)X10.1(59)4-X1.5.

(52)XX73(60)X-i-

(53)X1.8(61)102X

••

(54)(1.48+3.02)4-X0.5)(62)♦•

(63)X101-0.34.(71)K-1.03)]

(64)X32X(72)-5.6)X-1.05]4-0.04.

(65)X-X(73)-+(0.35+0.05)

(66)5044-X(74)8X[14--2.25)]

(67)(20-X9)X(75)X9.9+0.264

(68)X-rl.5(76)4.52+0.61+1.39+6.48

(69)(77)--1.73)

(70)XX0.12(78)-X6)+(6+8)

(79)XXX8X2.5.(87)

(80)X2.5(88)XX2)X1.25

(81)-4-2.5(89)+-X0.02.

(82)XX(90)4-X0.25

(83)X99+4.9(91)4-4-0.65)

(84)++2.5(92)X9.9

(85)XX6.8.(93)-X

(86)-5.8)X2.07(94)-4-X0.5

(95)XX4.7.(103)X2.8.

(96)4--6.5)X0.5］；(104)2.15+8.73+1.27+7.85

(97)X9-60.2；(105)-(8.2+1.87)

(98)4-4-0.25；(106)--

(99)-+7.6.(107)--0.44

(100)XX0.45(108)X270X2.5

(101)-4-3.5(109)(40+1.25)X8

(102)X102(110)-0.05)X8

(Ill)XX7.4(119)XX5.5.

(112)X-X(120)99X4.2+4.2

(113)X99+5.6(121)XX

(114)X(1.9+1.9+1.9+1.9)(122)X14+15X6.4+6.4

(115)4-4-8.(123)XX8)4-(80-77.4)

(116)-(15+0.6)+(124)4X(25+2.5+0.25)-rill

(117)X99+9.87(125)4--X4.5)4-0.32)

(118)4-4-0.4(126)X99+28.4

(127)X-0.45(135)(5.36+7.64)+13X100

(128)4XXX2.5(136)4--1.88)X0.2].

(129)4-X17+13.(137)-(5.5+1.24)

(130)X87(138)0.26+15.68+9.74+2.32

(131)4-(22-19.8)(139)-3.26

(132)X7.2.(140)-6.1+3.9.

(133)-4-6-6.24(141)4-0.63(保存2位小数)

(134)-X(142)X4-

(143)X4-4(151)67-(2.98+0.67)

(144)4-3.7)4-8(152)8X16-X6

(145)4-[4X-0.14)](153)(45+14)4-73+710.

(146)4-4--1.03)].(154)XX8

(147)--16.75(155)X[13-(3.12+5,28)]

(148)--90.85)小(156)102X0.56

(149)32XX0.125(157)XX1.7.

(150)18.1+(3-+0.23)XI.(158)5.18+0.73+0.82

(159)X4-1.5(167)-X3.6

(160)XX(168)184-X(8-6.5)]

(161)X99+6.12(169)12.7+12.5+0.5.

(162)4-0.86+8X(170)914-4-0.05=

(163)X-4-0.5)(171)XX6.3=

(164)XX80(172)X0.4)+2.5=

(165)XX2.8(173)4-2.5=

(166)(0.4+40)X(174)X7.4=

(175)4--rO.8=(183)104-4-2.5

(176)4-X-0.84)](184)64XX45

(177)4-1.5)XI.6.(185)XX

(178)-3.8+2.2(186)X102

(179)--2.43(187)X2.8

(180)-(1.47+6.8)(188)-r+0.5.

(181)13.26+4.71+3.47+5.29(189)X9X8X0.3

(182)-13.74.(190)・5+

(191)XX6.7(199)-X-0.75)

(192)5X[204--3.04)].(200)XX40

(193)XX8X0.2(201)XX4.54.

(194)X9+0.97(202)7XX0.8

(195)4-[3X(-)].(203)XX6.4

(196)X-0.8)CO.15(204)1.45X[12.8+4.4)+2.4].

(197)X4-(205)X-3.03)+6.3

(198)XX3.7(206)--(1.02+1.2)

(207)X[(5-0.68]+1.2](215)X-

(208)4-X(216)9.08+5.45+11.92+4.55

(209)(6.02+2.8)+-2.05(217)X30XX0.8.

(210)XXXO.3.(218)-0.208

(211)士(22-19.7)(219)XX8

(212)4---X2)j.(220)(64-+1.4)X

(213)XX3.6(221)--3.75

(214)XXXO.4(222)XX2.8

(223)(I.7+1.8))(231)-5.2)+0.4+2.54]X32.

(224)XX4(232)4-X1.5

(225)X2.1+10.8(233)-5X1.73

(226)-X(234)-0.78)X-1.95)

(227)X102(235)XX4

(228)XX4.4(236)・X

(229)X27-X17.(237)X-

(230)XX76.3.(238)XX0.25.

(239)X[(2.36+2.42)4-0.25](247)8X(20-1.25)

(240)4-[(1.3+0.6)X6-3.6](248)X6.5

(241)XX(249)XX0.8

(242)205X0.99(250)XX2.8.

(243)--2.51(251)6.23+3.09=

(244)--4.9)JX0.8.(252)-59.8=

(245)102X4.5(253)X0.84=

(246)(1.2+0,5)X5](254)4-0.023=

(255)-(8.6+9.7)XO.92]4-30.19.(263)X99+2.5；

(256)X32X2.5(264)-:5；

(257)X-X3.8(265)X2.4.

(258)X(266)--30.41

(259)2044-X0.5)(267)XX

(260)(43.26+2.34)+7.5(268)X(12.5+2.5)XO.1

(261)(20-X9)X5.7.(269)-X0.2)

(262)--1.2；(270)X12.5+48.7

(271)(8.16+2.09)+-9.3)-4-0.4].(274)XX75

(272)XX1.7(275)4--4.59)X4].

(273)X-1.9)XO.8

参考答案：

XX0.11,X-2.914-0.03],

X(1.8+8.2),X4-0.03],

X10,X17,

=1.1;=30.6：

X99+2.34,X32X2.5,

X(99+1),X8)X(4X2.5),

X100,=1X10,

=234；=10

+X0.8,X-X18.5,

=2X0.8,X-0.258),

=1.6；XI,

(4)132X101,=18.5：

=132X(100+1),4-XO.9,

=132X100+132,X0.9,

=13332；=9.54；

-r-?0.8,X2.4,

4-X0.8),X8X0.3,

+1,=10X0.3,

=6.25；=3；

X16,+(1.3+0.5)X6,

X4)X4,4-X6,

=40X6,

X101-6.33,

X(101-1),-6.17)-(6.8+3.2),

xioo,=11-10,

=633；=1：

XX1.7,X[(1.3+2.15)4-0.2]

X(1.56+0.44),X+0.2],

X2,X17.25,

=3.4；=93.15；

4-0.9,

=14+21=7.28+0.8,

=35；(31)4.32+5.43+6.68,

X=4.32+6.68+5.43,

XXO.1,=11+5.43,

=168+1.68,=16.43；

8；--3.2,

*

-(6.8+3.21,

-4.5+1.8,-10,

=8.2；=7.17；

XXX9+5.29,

X0.8)X(4X0.25),X(9+1),

=1X1,X10,

=1=52.9；

(21)1.36+4.85+2.64+6.15,X10.1,

=(1.36+2.64)+(4.85+6.15),XXO.1,

=4+11,=168+1.68,

=15；=169.68；

4-4-4,X9.5+5X0.274,

・X4),XX2.74,

4-10,X(9.5+0.5),

=9.85：X10,

4-X-2.9)],=27.4；

+X0.8],+3.2,

+2,=0.36+3,

=2.7；XX25,

X(4-3.68)4-0.01,=25X(3.75+6.25),

X4-0.01,=25X10,

♦0.01,=250；

=25.6；--1.76,

--0.17,-(8.23+1.76),

-(12.83+0.17),

-13,7；

=70.7；X10,

(26)5.96+13X-3.12),=2.9+71,

=5.96+13X0.08,=73.9；

=5.96+1.04,X32X

=7.X8)X(4X0.25),

4-X1.7,=10X1

XI.7,=10

=3.06；--4.32)-2.32,

XX4.5,--2.32,

=(16.2+3.8)X4.5,=(15.68+4.32)-(7.78+2.32),

=20X4.5,=20-10.1

=90：一♦

--3.14,XX1.25,

-(3.86+3.14),X4XXL25,

-7,X4)XXI.25),

=2.05；=1X1,

=1;:1.8,

XI.OL=2.5；

=(1O-O.O1)XI.01,-4.9)X101-31.8,

-0.0101,X101-31.8,

=10.0899；X(101-1),

XXO.86,X100,

XXO.86,=3180

X(0.14+0.86),X101-

XI,X(101-1),

=46.3；xioo,

4-4-12.5,=633；

4-X12.5),-5X1.73,

4-10,-8.65,

=1.75；=26.95；

(46)0.9+9.9+99.9+999.9,X-XO.6,

=1-0.1+10-0.1+100-0.1+1000-0.1,X-0.6),

=(1+10+100+1000)-(0.1+0.1+0.1+0.1),XI,

=1111-0.4,=55.4；

X4-XI.5,

=(99+1)X2.9,=3.4+4.05,

=100X2.9,X-r

=290：4-XO.8,

(48)25XX4=4X0.8,

=25X4X11.2,=3.2；

=100X11.2,(61)102X

=1120；=(100+2)XO.45,

--=100X0.45+2X0.45,

-(6.75+3.25),=45+0.9,

-10,=45.9：

■■

=13.25••

(50)125XX2.5,・X0.8),

=125X8XX2.5,+1,

=(125X8)XX2.5),=22.78；

=1000X1,X101-

=1000；=(101-1)XO.34,

X10.L=100X0.34,

X(10W.1),=34

XXO.1,X32X2.5,

=36+0.36,X8)X(4X2.5),

=36.36；=1X10,

XX73,=10：

XX7.3,X-X3.8,

X12.7+7.3),=0.8X-3.8),

X10,X2.5,

=58：:2；

XI.8,(66)504-rX2.08,

=3.6+11.52,X2.08,

=15.12；=327.6；

(54)(1.48+3.02)4-X0.5),(67)(20-X9)X5

=(20-7.2)X5.7,X2.5,

X5.7,=4.98+20.25,

X+1.5,=25.03；

=3.6+2.4,-+2.5,

=6；-16.32,

--2.86,=44.48；

=(7.38+3.62)-(5.14+2.86),XX12.5,

=11-8,X12.5)X69.6,

=3；=10X69.6,

XX0.12,=696；

X(1.8+8.2),X99+4.9,

X10,=493.02+4.9,

=1.2；=497.92；

-r-r-1.03)],-r-?2.5,

4-4-0.17],+X2.5),

+3,+8,

=1.8；=0.81；

-5.6)X・1.05]+0.04,XX6.8,

X-1.05]4-0.04,X(1.2+6.8),

-1.05]4-0.04,X8,

4-0.04,=60.8

=30(86)(9.4-5.8)x2.07,

-4-(0.35+0.05),=3.6x2.07,

-4-0.4,=7.452；

-2,(87)12.54-4.56-3.44-1.54,

=8.8；=(12.54-1.54)-(4.56+3.44),

(74)8X[14--2.25)],=11-8,

=8X[14-0.05],二3；

二8X20,(88)(9.36*5+9.36+9.36*2)*1.25,

=160；=9.36x：5+2+l)x|.25,

X9.9+0.264,=9.36x8x1.25,

X99+0.264,=9.36x：8x1.25),

X[99+1),=93.6；

X100,(89)7.236+0.18-14.3x0.02,

=26.4；=40.2-0.286,

=(4.52+6.48)+(0.61+1.39),=39.914.

=11+2,-rXO.25,

=13；=24X0.25,

--1.73)=6；

-0.23,4--i-0.65),

=4.04；~r9,

-X6)+(6+8)=3.3；

-115.2)+14,X9.9,

+14,X(10-0.1),

=12.8：X10-XO.1,

XXX8X=74-0.74,

X8)XX2.5)XO.76,=73.26；

=100X1X0.76,-X0.64,

=76.-1.728,

=2.112：--0.44,

—rX0.5,=(4.38+0.62)-(1.56+0.44),

-XO.5,=5-2,

-7.75,=3；

=0.93；X270X2.5,

XX4.7,X2.5)X270,

X(4.7+4.3+1),=270；

X1O,(109)(40+1.25)X8,

=47=40XX8,

-6.5)XO.5]=320+10,

-rXO.5]>=330；

・0.85,-0.05)X8,

=3.2；X8-X8,

X9-=100-0.4,

=(1+9)X-60.2,=99.6；

=10X-60.2,XX7.4,

-60.2,=(2.6+7.4)X8.5,

=31：=85；

■•

•♦X-X3.9,

-rXO.25),-3.9)X6.9,

4-0.1,=6X6.9,

=284；=41.4：

*X99+5.6,

=27.36-3.6,X(99+1),

XX0.15,=560；

X[3.25+6.75),X(1.9+1.9+1.9+1.9),

X10,X4X1.9,

=4.5；=10X1.9,

--3.5,=19：

-7,4--r8,

=24.5；4-84-1.25,

X102,-r1.25»

X(100+2),=0.72.

XX2,-(15-H).6)+1.6,

=750+15,—1.6>

=765；-9.75,

X2.8,=42.65；

=6.3110.36,X9919.87,

=16.66.X(99+1),

=(2.15+7.85)+(8.73+1.27),=987；

=10+10,4-4-0.4,

=20；4-X0.4),

-(8.2+1.87),