小数四则混合运算专项练习题有答案ok文档格式.docx
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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×
(41)15.68﹣(7.78﹣4.32)﹣2.32
(42)0.25×
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×
2.5
(51)3.6×
(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×
(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×
0.27
(61)102×
0.45
(62)22.78÷
(63)0.34×
101﹣0.34.
(64)0.125×
2.5
(65)0.8×
6.3﹣0.8×
3.8
(66)504÷
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×
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×
(80)4.98+8.02×
(81)60.8﹣40.8÷
(82)0.8×
69.6×
12.5
(83)4.98×
99+4.9
(84)6.48÷
3.2÷
(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)×
(89)7.236÷
0.18﹣14.3×
0.02.
(90)9.6÷
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÷
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×
12.5×
(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
(143)0.32×
0.25+0.08÷
(144)(9.6+1.48÷
3.7)÷
(145)5.8÷
[4×
(1.34﹣0.14)]
(146)5.4÷
(1.2﹣1.03)].
(147)21.35﹣3.25﹣16.75
(148)33.02﹣(148.4﹣90.85)÷
(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×
(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÷
(160)12.5×
7.1×
(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)×
(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÷
(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÷
(185)64×
4.5+3.6×
45
(186)1.25×
(187)14.5×
102
(188)14.64+3.7×
(189)8.4÷
0.21÷
0.5.
(190)0.125×
9×
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×
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×
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×
(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
(215)0.25×
(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×
(221)(64﹣22.4÷
1.4)×
1.2
(222)18.3﹣6.25﹣3.75
(223)2.8×
(224)6.6÷
〔14.5﹣(1.7+1.8)〕
(225)0.25×
9.87×
(226)36.7×
2.1+10.8
(227)8.45﹣0.45×
0.1
(228)0.73×
(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÷
(234)35.6﹣5×
(235)(1.1﹣0.78)×
(2.7﹣1.95)
(236)1.3×
0.75×
(237)1.08÷
1.8×
(238)50.4×
1.9﹣1.8
(239)0.82×
0.25+1.18×
(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)]×
(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×
(251)3.91×
2.8+6.09×
(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×
(258)0.8×
3.8
(259)50.4÷
(260)204÷
(3.4×
(261)(43.26+2.34)÷
7.5
(262)(20﹣0.8×
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)×
(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
(274)12.5×
(7.2﹣1.9)×
(275)0.25×
2010+20.10×
75
(276)30.8÷
[(6.34﹣4.59)×
4].
参考答案:
0.11,
=0.11×
(1.8+8.2),
10,
=1.1;
99+2.34,
=2.34×
(99+1),
100,
=234;
0.8,
=2×
=1.6;
101,
=132×
(100+1),
100+132,
=13332;
=6.25÷
(1.25×
0.8),
1,
=6.25;
16,
=(2.5×
4)×
4,
=40
101﹣6.33,
=6.33×
(101﹣1),
=633;
1.7,
=1.7×
(1.56+0.44),
2,
=3.4;
0.03],
=1.8×
17,
=30.6;
2.5,
=(0.125×
8)×
(4×
2.5),
=1×
=10
18.5,
=18.5×
(1.258﹣0.258),
=18.5;
0.9,
=10.6×
=9.54;
2.4,
=1.25×
0.3,
=10×
=3;
6,
=5.85÷
=3.25×
=19.5
(15)17.17﹣6.8﹣3.2﹣6.17
=(17.17﹣6.17)﹣(6.8+3.2),
=11﹣10,
=1;
0.2]
=5.4×
[3.45÷
0.2],
17.25,
=93.15;
=14+21
=35;
10.1
=16.8×
10+16.8×
0.1,
=168+1.68,
=169.68;
0.2+1.8
=10.9﹣4.5+1.8,
=8.2;
=(1.25×
0.8)×
0.25),
=1
(21)1.36+4.85+2.64+6.15,
=(1.36+2.64)+(4.85+6.15),
=4+11,
=15;
=98.5÷
(2.5×
4),
=9.85;
(3.7﹣2.9)],
=5.4÷
0.8],
=2.7;
0.01,
=0.8×
0.32÷
=0.256÷
=25.6;
(25)83.7﹣12.83﹣0.17,
=83.7﹣(12.83+0.17),
=83.7﹣13,
=70.7;
(3.2﹣3.12),
=5.96+13×
0.08,
=5.96+1.04,
=7.
=3.06;
4.5,
=(16.2+3.8)×
=20×
=90;
(29)9.05﹣3.86﹣3.14,
=9.05﹣(3.86+3.14),
=9.05﹣7,
=2.05;
=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;
9+5.29,
=5.29×
(9+1),
=52.9;
10.1,
0.274,
=2.74×
9.5+0.5×
2.74,
(9.5+0.5),
=27.4;
3.2,
=0.36+3,
=3.36
25,
=25×
(3.75+6.25),
=250;
(38)25.46﹣8.23﹣1.76,
=25.46﹣(8.23+1.76),
=25.46﹣9.99
=15.45;
=2.9+71,
=73.9;
=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;
1.25,
=0.25×
4×
=(0.25×
(0.8×
1.25),
1.01,
=(10﹣0.01)×
=10.1﹣0.0101,
=10.0899;
0.86,
=46.3×
0.14+46.3×
(0.14+0.86),
=46.3;
12.5,
=17.5÷
12.5),
=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
99+2.9
=(99+1)×
2.9,
=100×
=290;
11.2,
=1120;
(49)23.25﹣6.75﹣3.25
=23.25﹣(6.75+3.25),
=23.25﹣10,
=13.25
=125×
=(125×
(0.4×
=1000×
=1000;
=3.6×
(10+0.1),
10+3.6×
=36+0.36,
=36.36;
73,
=5.8×
2.7+5.8×
7.3,
(2.7+7.3),
=58;
1.8,
=3.6+11.52,
=15.12;
0.5),
=4.5÷
=2.5;
101﹣31.8,
=31.8×
=3180
101﹣6.33
1.73,
=35.6﹣8.65,
=26.95;
0.6,
=55.4×
(1.6﹣0.6),
=55.4;
1.5,
=3.4+4.05,
=7.45
=1.08÷
0.27×
=4×
=3.2;
=(100+2)×
0.45,
0.45+2×
=45+0.9,
=45.9;
=22.78÷
=22.78;
101﹣0.34
=(101﹣1)×
0.34,
=34
6.3﹣0