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.docx
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小数四则混合运算专项练习276题有答案ok
能简算的要简算呦,加油,你是最棒的!
小数混合运算专项练习276题(有答案)
(1)0.11X1.8+8.2X0.11
(9)1.8X[(3.41-2.9)-0.03]
(2)2.34X99+2.34
(10)0.125X32X2.5.
(3)5.4-2.7X0.8
(11)1.258X18.5-0.258X18.5
(4)132X101
(12)8.48-0.8X0.9
(13)1.25X2.4
(5)6.25-1.25-0.8
(6)2.5X16.
(14)5.85-(1.3+0.5)X6.
(7)6.33X101-6.33
(15)17.17-6.8-3.2-6.17
(8)1.56X1.7+0.44X1.7
(16)5.4X[(1.3+2.15)-0.2]
(17)
8.4-0.6+8.4-0.4
(25)83.7-12.83-0.17
(18)
16.8X10.1
(26)5.96+13X(3.2-3.12)
(19)
10.9-0.9-0.2+1.8
(27)4.32-2.4X1.7;
(20)
1.25X3.2X0.25.
(28)16.2X4.5+3.8X4.5;
(21)
1.36+4.85+2.64+6.15
(29)9.05-3.86-3.14;
(22)
98.5-2.5-4
(30)7.28+0.72-0.9
(23)
5.4-[2.5X(3.7-2.9)]
(31)4.32+5.43+6.68
(24)
0.8X(4-3.68)-0.01
(32)17.17-6.8-3.2
(33)
5.29X9+5.29
(41)
15.68-(7.78-4.32)-2.32
(34)
16.8X10.1
(42)
0.25X3.2X1.25
(43)9.99X1.01
(35)2.74X9.5+5X0.274
(44)
(36)0.36+9.6-3.2.
4.63X1.4+46.3X0.86
(37)3.75X25+6.25X25
(45)17.5-0.8-12.5
(38)25.46-8.23-1.76
(46)0.9+9.9+99.9+999.9.
(39)
(47)2.9X99+2.9
2.9+7.1X10
(48)25X11.2X4
(40)1.25X32X0.25.
(49)23.25—6.75-3.25.
(57)35.6-5X1.73
(50)125X3.2X2.5
(58)
1.6X55.4-55.4X0.6
(51)3.6X10.1
(59)
17.68-5.2+2.7X1.5.
(52)5.8X2.7+0.58X73
(60)
1.08X0.8-0.27
(53)3.6+6.4X1.8
(61)
102X0.45
(54)(1.48+3.02)-(3.6X0.5)
(62)
22.78-1.25-0.8
(55)(36.7-4.9)X101-31.8.
(63)
0.34X101-0.34.
(56)6.33X101-6.33
(64)
0.125X32X2.5
0.8X6.3-0.8X3.8
(73)
10.8-0.8-(0.35+0.05)
504-3.2X2.08
(74)
8X[1-(2.3-2.25)]
(20-0.8X9)X5.7
(75)
2.64X9.9+0.264
2.4X1.5+3.6-1.5
(76)
4.52+0.61+1.39+6.48
(65)
(66)
(67)
(68)
(71)
5.4-[0.51-(1.2-1.03)]
(79)12.5X0.76X0.4X8X2.5.
60.8-40.8-2.5
(89)
7.236-0.18-14.3X0.02
0.8X69.6X12.5
(90)
9.6-0.4X0.25
4.98X99+4.9
(91)
29.7-(5.85-0.65)
6.48-3.2-2.5
(92)
7.4X9.9
1.2X7.6+7.6X6.8.
(93)
3.84-2.7X0.64
(9.4-5.8)X2.07
(94)
8.68-8.68-0.56X0.5
(81)
(82)
(83)
(84)
(85)
(86)
(87)
12.54-4.56-3.44-1.54
(95)4.7X4.7+4.7+4.3X4.7.
(88)
(9.36X5+9.36+9.36X2)X1.25
(96)2.72-[(8.2-6.5)X0.5];
(98)28.4-0.4-0.25;
(106)5.42-3.87-1.13
(99)27.36-27.36-7.6.
(107)4.38-1.56+0.62-0.44
(108)0.4X270X2.
(100)3.25X0.45+6.75X0.45
(101)31.5-24.5-3.5
(109)(40+1.25)X8
(102)7.5X102
(103)6.3+3.7X2.8.
(110)(12.5-0.05)X8
(111)2.6X8.5+8.5X7.4
(114)2.5X(1.9+1.9+1.9+1.9)
(122)6.4X14+15X6.4+6.4
(116)52.4-(15+0.6)-1.6
(124)4X(25+2.5+0.25)-111
(115)7.2-1.25-&
(123)(1.3+1.3X0.125X8)-(80-77.4)
(117)9.87X99+9.87
(125)6.25-〔(17.2-3.6X4.5)-0.32〕
(126)28.4X99+28.4
(118)46.8-0.9-0.4
(119)5.5X17.3+6.7X5.5.
(127)0.94X2.5-0.45
(130)10.1X87
(138)
0.26+15.68+9.74+2.32
(131)2.3+3.19-(22-19.8)
(139)
13.26+9.55-3.26
(132)1.25X7.2.
(140)
6.1+3.9-6.1+3.9.
(133)9.1-1.2-6-6.24
(141)
31.7-0.63(保留2位小数)
(134)7.3+12.8-3.8X2.3
(142)
2.4X1.5+3.6-1.5
(135)(5.36+7.64)-13X100
(143)
0.32X0.25+0.08-4
(136)7.575-[(5.63-1.88)X0.2].
(144)
(9.6+1.48-3.7)-8
(154)13.7X0.125X8
(146)5.4-[0.51-(1.2-1.03)].
(147)21.35-3.25-16.75
(155)0.8X[13-(3.12+5.28)]
(156)102X0.56
(148)33.02-(148.4-90.85)-2.5
(149)32X2.5X0.125
(157)1.53X1.7+0.47X1.7.
(158)5.18+0.73+0.82
(150)18.1+(3-0.299-0.23)X1.
(151)67-(2.98+0.67)
(159)0.75X1.8-1.5
(152)8X16-73.8X6
(160)12.5X7.1X0.8
(162)8.6-0.86+8X0.35
(170)91-2.6-0.05=
(171)6.3X3.7+6.3X6.3=
(163)5.6X(18.5-8.5-0.5)
(172)
(164)0.125X4.78X80
(3.7+1.7X0.4)-2.5=
(165)2.8X3.6+1.4X2.8
(173)7.28+3.2-2.5=
(166)(0.4+40)X2.5
(174)0.74+0.9X7.4=
(167)78.7-17.7X3.6
(175)7.8-0.125-0.8=
(168)18-[0.3X(8-6.5)]
(176)37.5-[0.3X(1.34-0.84)]
(178)6.21-3.8+2.2
(186)
1.25X3.2X0.8
(179)6.03+3.7+2.97
(187)
14.5X102
(180)17.43-6.57-2.43
(188)
14.64+3.7X2.8
(181)20.47-(1.47+6.8)
(189)
8.4—0.21—0.5.
(182)13.26+4.71+3.47+5.29
(183)22.74+8.68-13.74.
(190)
0.125X9X8X0.3
(184)10-0.2-2.5
(191)
4.62-5-0.66
(193)
7.75X[20-(3.24-3.04)].
(201)0.25X3.85X40
1.25X0.5X8X0.2
(202)
1.46X3.5+3.5X4.54.
0.97X9+0.97
(203)
7X12.5X0.8
5.4-[3X(3.8-2.9)].
(204)
4.7X3.6+4.7X6.4
0.4X(3.2-0.8)-0.15
(205)
1.45X[(2.8+4.4)-2.4].
5.7+1.9X0.2-7.6
(206)
4.2X(6.18-3.03)+6.3
32.4X6.3+32.4X3.7
(207)
15.02-6.8-(1.02+1.2)
(194)
(195)
(196)
(197)
(198)
(209)2.7-4+6.3X0.25
(217)9.08+5.45+11.92+4.55
(210)(6.02+2.8)-0.4-2.05
(218)1.25X30X1.2X0.8.
(211)3.08X3.5+6.2X3.08+3.08X0.3.
(219)0.6+0.94-0.208
(212)2.3+3.91-(22-19.7)
(220)4.85X1.25X8
(213)21.6-[64.8-(48.6-2.7X2)].
(221)(64-22.4-1.4)X1.2
(214)
93.6X3.6+1.4X3.6
(222)
18.3-6.25-3.75
(215)
0.25X0.8X0.125X0.4
(223)
2.8X3.6+1.4X2.8
(225)0.25X9.87X4
(233)17.68-5.2+2.7X1.5
(226)36.7X2.1+10.8
(234)35.6-5X1.73
(227)8.45-0.45X0.1
(228)0.73X102
(237)1.08-1.8X1.2
(238)50.4X1.9-1.8
(235)(1.1-0.78)X(2.7-1.95)
(236)1.3X0.75X4
(229)7.8X5.6+2.3X4.4
(230)76.3X27-76.3X17.
(241)3.9-[(1.3+0.6)X6-3.6]
(249)
0.654+10.9X6.5
(242)4.25X6.3+3.7X4.25
(250)
22.7X1.25X0.8
(243)205X0.99
(251)
3.91X2.8+6.09X2.8.
(244)25.6-7.49-2.51
(252)
6.23+3.09=
(245)[2.5-(6.8-4.9)]X0.8.
(253)
132.4-59.8=
(246)102X4.5
(254)
6.62X0.84=
(257)0.125X32X2.5
(265)10.36+4.8-16.5-5;
(266)12.5X2.4.
(258)0.8X6.3-0.8X3.8
(259)50.4-3.2X2.08
(267)38.78-19.59+41.22-30.41
(260)204-(3.4X0.5)
(268)2.74X4.86+4.86X6.26+4.86
(261)(43.26+2.34)-7.5
(269)0.08X(12.5+2.5)X0.1
(262)(20-0.8X9)X5.7.
(270)25.92+(10.1-14.5X0.2)
(273)1.56X1.7+0.44X1.7
(276)30.8-[(6.34-4.59)X4].
(274)12.5X(7.2-1.9)X0.8
参考答案:
(1)0.11X1.8+8.2X0.11,
=0.11X(1.8+8.2),
=0.11X10,
=1.1;
(2)2.34X99+2.34,
=2.34X(99+1),
=2.34X100,
=234;
(3)5.4-2.7X0.8,
=2X0.8,
=1.6;
(4)132X101,
=132X(100+1),
=132X100+132,
=13332;
(5)6.25-1.25-0.8,
=6.25-(1.25X0.8),
=6.25-1,
=6.25;
(6)2.5X16,
=(2.5X4)X4,
=40
(7)6.33X101-6.33,
=6.33X(101-1),
=6.33X100,
=633;
(8)1.56X1.7+0.44X1.7,
=1.7X(1.56+0.44),
=1.7X2,
=3.4;
(9)1.8X[(3.41-2.9)-0.03],
=1.8X[0.51-0.03],
=1.8X17,
=30.6;
(10)0.125X32X2.5,
=(0.125X8)X(4X2.5),
=1X10,
=10
(11)1.258X18.5-0.258X18.5,
=18.5X(1.258-0.258),
=18.5X1,
=18.5;
(12)8.48-0.8X0.9,
=10.6X0.9,
=9.54;
(13)1.25X2.4,
=1.25X8X0.3,
=10X0.3,
=3;
(14)5.85-(1.3+0.5)X6,
=5.85-1.8X6,
=3.25X6,
=19.5
(15)17.17-6.8-3.2-6.17
=(17.17-6.17)-(6.8+3.2),
=11-10,
=1;
(16)5.4X[(1.3+2.15)-0.2]
=5.4X[3.45-0.2],
=5.4X17.25,
=93.15;
(17)8.4-0.6+8.4-0.4
=14+21
=35;
(18)16.8X10.1
=16.8X10+16.8X0.1,
=168+1.68,
=169.68;
(19)10.9-0.9-0.2+1.8
=10.9-4.5+1.8,
=8.2;
(20)1.25X3.2X0.25
=(1.25X0.8)X(4X0.25),
=1X1,
=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-(2.5X4),
=98.5-10,
=9.85;
(23)5.4-[2.5X(3.7-2.9)],
=5.4-[2.5X0.8],
=5.4-2,
=2.7;
(24)0.8X(4-3.68)-0.01,
=0.8X0.32-0.01,
=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+13X(3.2-3.12),
=5.96+13X0.08,
=5.96+1.04,
=7.
(27)4.32-2.4X1.7,
=1.8X1.7,
=3.06;
(28)16.2X4.5+3.8X4.5,
=(16.2+3.8)X4.5,
=20X4.5,
=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)5.29X9+5.29,
=5.29X(9+1),
=5.29X10,
=52.9;
(34)16.8X10.1,
=16.8X10+16.8X0.1,
=168+1.68,
=169.68;
(35)2.74X9.5+5X0.274,
=2.74X9.5+0.5X2.74,
=2.74X(9.5+0.5),
=2.74X10,
=27.4;
(36)0.36+9.6-3.2,
=0.36+3,
=3.36
(37)3.75X25+6.25X25,
(38)25.46-8.23-1.76,
=25.46-(8.23+1.76),
=25.46-9.99
=15.45;
(39)2.9+7.1X10,
=2.9+71,
=73.9;
(40)1.25X32X0.25
=(1.25X8)X(4X0.25),
=10X1,
=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)0.25X3.2X1.25,
=0.25X4X0.8X1.25,
=(0.25X4)X(0.8X1.25),
=1X1,
=1;
(43)9.99X1.01,
=(10-0.01)x1.01,
=10.1-0.0101,
=10.0899;
(44)4.63X1.4+46.3X0.86,
=46.3X0.14+46.3X0.86,
=46.3X(0.14+0.86),
=46.3X1,
=46.3;
(45)17.5-0.8-12.5,
=17.5-(0.8X12.5),
=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)2.9X99+2.9
=(99+1)X2.9,
=100X2.9,
=290;
(48)25X11.2X4
=25X4X11.2,
=100X11.2,
=1120;
(49)23.25-6.75-3.25
=23.25-(6.75+3.25),
=23.25-10,
=13.25
(50)125X3.2X2.5,
=125X8X0.4X2.5,
=(125X8)X(0.4X2.5),
=1000X1,
=1000;
(51)3.6X10.1,
=3.6X(10+0.1),
=3.6X10+3.6X0.1,
=36+0.36,
=36.36;
(52)5.8X2.7+0.58X73
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