计算习题 答案Word文档下载推荐.docx
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计算习题 答案Word文档下载推荐.docx
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(39)
4.5×
0.002=0.009
(40)
200=740
(41)
0.072×
0.15=0.0108
(42)
1.7×
0.45=0.765
(43)
6.5×
10(口算)=65
(44)
3.78×
100(口算)=378
(45)
82÷
10(口算)=8.2
(46)
560÷
100(口算)=5.6
(47)
4080÷
1000(口算)=4.08
(48)
3.06×
36=110.16
(49)
15.6×
15=234
(50)
0.82×
2=1.64
(51)
7=22.4
(52)
2.07×
30=62.1
(53)
3.95×
42=165.9
(54)
0.10×
25(口算)=2.5
(55)
2.7×
60=162
(56)
0.76×
8.9=6.764
(57)
2.02×
5.5=11.11
(58)
0.38×
0.25=0.095
(59)
0.72×
3.5=2.52
(60)
8.64×
2.8=24.192
(61)
0.14=0.0784
(62)
(63)
3.14×
0.08=0.2512
(64)
1.5×
2.8=4.2
(65)
2.05=0.656
(66)
7.38×
0.25=1.845
(67)
0.3=0.144
(68)
0.12×
0.24=0.0288
(69)
4.8=2.16
(70)
48.7×
0.06=2.922
(71)
0.98×
1.02=0.9996
(72)
3.2=2.432
(73)
1.02×
0.76=0.7752
(74)
0.033×
3=0.099
(75)
1.07=0.5992
(76)
7.5×
4.3=32.25
(77)
6.7=16.08
(78)
3.5×
0.59=2.065
(79)
14.2×
0.27=3.834
(80)
0.36×
4.4=1.584
(81)
12.5×
3.4×
0.8
=12.5×
0.8×
3.4
=10×
=34
(82)
4.36×
2.5+5.64×
2.5
=2.5×
(4.36+5.64)
10
=25
(83)
2.4+7.6×
6.5
=6.5×
(2.4+7.6)
=65
(84)
37×
8
=4.44×
=35.52
(85)0.4×
63×
=0.4×
2.5×
63
=1×
=63
(86)3.54×
9.9+3.54×
0.1
=3.54×
(9.9+0.1)
=35.4
(87)
10.1
=0.72×
(10+0.1)
10+0.72×
=7.2+0.072
=7.272
(88)
1.25×
(8+0.8)
=1.25×
8+1.25×
=10+1
=11
(89)
3.6+2.4×
0.06
=3.6+0.144
=3.744
(90)
3.72×
99+3.72
=3.72×
(99+1)
100
=372
(91)
9.98×
9.9
=9.98×
(10-0.1)
10-9.98×
=99.8-0.998
=98.802
(92)
0.9×
0.9
=0.9
(93)
4×
(6.3×
2.5)
=4×
6.3
(94)
6.4×
0.25×
12.5
=8×
=(8×
0.25)×
(0.8×
12.5)
=2×
1
=2
(95)
16.7-2.5×
0.7
(16.7-0.7)
16
4
=40
(96)
2.9×
0.45+0.29×
4.2+0.029×
13
=2.9×
0.45+2.9×
0.42+2.9×
0.13
(0.45+0.42+0.13)
=2.9
(97)
43×
11.8+5.7×
118
=43×
11.8+57×
11.8
11.8×
(43+57)
=11.8×
=1180
(98)
1.5-0.45
=0.54-0.45
=0.09
(99)
0.23+0.62×
0.23
=0.23×
(0.38+0.62)
=0.23
(100)
9.58×
1.25
=0.8×
9.58
=9.58
(101)
5.45+0.65×
4.7
=5.45+3.055
=8.505
(102)
25×
10.7-25×
(10.7-0.7)
=25×
=250
(103)
99
=6.4×
(100-1)
100-6.4×
=640-6.4
=633.6
(104)
0.65×
202
=0.65×
(200+2)
200+0.65×
2
=130+1.3
=131.3
(105)
4.78×
=0.25×
4.78
=4.78
(106)
(0.77×
0.4)
0.4×
0.77
=0.77
(107)
7.2×
8.4+2.8×
8.4
=8.4×
(7.2+2.8)
=84
(108)
0.034×
0.5×
0.6
=0.034×
(0.5×
0.6)
0.3
=0.0102
(109)
101×
0.45
=(100+1)×
=100×
0.45+1×
=45+0.45
=45.45
(110)
2.73×
=2.73×
100-2.73×
=273-2.73
=270.27
(111)
4.75×
99+4.75
=4.75×
=475
(112)
4.8×
0.25
1.2
=1.2
(113)
105
=1.5×
(100+5)
100+1.5×
5
=150+7.5
=157.5
(114)
0.78×
98
=0.78×
(100-2)
100-0.78×
=78-1.56
=76.44
(115)
2.33×
=0.5×
8×
2.33
=9.32
(116)
2.5+0.8×
(1.2+0.8)
=5
(117)
8.5
=(2+0.02)×
8.5+0.02×
=17+0.17
=17.17
(118)
=7×
(8×
1.25)
=70
(119)
1.6×
=(2×
7.5)×
=15×
=15
(120)
=(0.8×
12.5)×
(0.25×
=1
(121)
2.96×
40
=(3-0.04)×
=3×
40-0.04×
=120-1.6
=118.4
(122)
9.8×
25
=(10-0.2)×
25-0.2×
=250-5
=245
(123)
97×
=(100-3)×
8.5-3×
=850-25.5
=824.5
(124)
(125)
5.5×
=18×
=99×
=792
(126)
4.38×
=4.38×
100-4.38×
=438-8.76
=429.24
(127)
8.8
(128)
=(1.25×
8)×
(2.5×
4)
=100
(129)
50.4×
1.9-1.8
=95.76-1.8
=93.96
(130)
3.76×
0.25+25.8
=0.94+25.8
=26.74
(131)
3.5+6.5×
8.3
=3.5+53.95
=57.45
(132)
2.5+7.5×
55
=2.5+412.5
=415
(133)
10.3-0.3×
8.6
=10.3-2.58
=7.72
(134)
5.9×
19.8-9.8
=116.82-9.8
=107.02
(135)
14.6-4.6×
=51.1-23
=28.1
(136)
=(4×
2.5)×
(1.25×
0.8)
=10
(137)
64
=80
(138)
99+0.37
=0.37×
=37
(139)
0.28×
9=2.52
(140)
23=55.2
(141)
31.6×
18=568.8
(142)
0.47×
80=37.6
(143)
4.6×
0.8=3.68
(144)
2.6=8.32
(145)
1.05=2.835
(146)
0.8=0.2
(147)
19=49.4
(148)
5.2×
0.48=2.496
(149)
2.8×
5.9=16.52
(150)
0.65=2.21
(151)
3.8=20.52
(152)
2.5=0.9
(153)
0.42×
0.04=0.0168
(154)
0.085×
0.24=0.0204
(155)
0.43×
56=24.08
(156)
0.058×
0.25=0.0145
(157)
54×
0.035==1.89
(158)
7.6×
0.008=0.0608
(159)
15.8×
6=94.8
(160)
3.6×
8.5=30.6
(161)
18.4×
0.36=6.624
(162)
0.024=0.03
(163)
3.63÷
3=1.21
(164)
25.6÷
4=6.4
(165)
93.75÷
75=1.25
(166)
0.39÷
3=0.13
(167)
8.5÷
5=1.7
(168)
5.16÷
3=1.72
(169)
21.6÷
9=2.4
(170)
85.1÷
37=2.3
(171)
52.5÷
25=2.1
(172)
33.6÷
3=11.2
(173)
9.8÷
7=1.4
(174)
20.4÷
24=0.85
(175)
0.32÷
8=0.04
(176)
0.84÷
21=0.04
(177)
96÷
15=6.4
(178)
12.96÷
12=1.08
(179)
4.32÷
16=0.27
(180)
0.72÷
8=0.09
(181)
1.53÷
34=0.045
(182)
0.78÷
12=0.065
(183)
2.4÷
28=0.0857142857142…
(184)
60÷
25=2.4
(185)
10.88÷
17=0.64
(186)
24.96÷
12=2.08
(187)
24÷
15=1.6
(188)
1.26÷
12=0.105
(189)
1.35÷
15=0.09
(190)
96.6÷
23=4.2
(191)
23.75÷
9.5=2.5
(192)
5.58÷
3.1=1.8
(193)
49.4÷
0.26=190
(194)
0.56÷
0.25=2.24
(195)
0.928÷
5.8=0.16
(196)
1÷
0.16=6.25
(197)
3.6÷
2.4=1.5
(198)
158÷
0.5=316
(199)
50=3.16
(200)
1.58÷
0.05=31.6
(201)
15.6÷
12=1.3
(202)
46.8÷
0.45=104
(203)
3.52÷
5.5=0.64
(204)
21÷
3.5=6
(205)
328÷
16=20.5
(206)
27=0.05
(207)
0.646÷
19=0.034
(208)
319.46÷
5=63.892
(209)
0.03÷
0.8=0.0375
(210)
2.2÷
3=0.73333…
(211)
5.3÷
11=0.4818181…
(212)
3.6=0.1555…
(213)
3.7÷
66=0.05606060…
(214)
0.3÷
40=0.0075
(215)
72÷
(216)
14.21÷
7=2.03
(217)
25.5÷
6=4.25
(218)
7.83÷
9=0.87
(219)
0.54÷
6=0.09
(220)
6.3÷
14=0.45
(221)
86÷
16=5.375
(222)
28=0.045
(223)
0.416÷
32=0.013
(224)
6.6÷
4=1.65
(225)
37.5÷
6=6.25
(226)
43.5÷
29=1.5
(227)
28.6÷
11=2.6
(228)
18.9÷
27=0.7
(229)
(230)
(231)
3.64÷
52=0.07
(232)
(233)
18=0.07
(234)
5.04÷
6=0.84
(235)
76.5÷
45=1.7
(236)
45÷
36=1.25
(237)
28=0.03
(238)
150÷
500=0.3
(239)
7.65÷
0.85=9
(240)
62.4÷
2.6=24
(241)
2.38÷
0.34=7
(242)
0.544÷
0.16=3.4
(243)
12.6÷
0.28=45
(244)
2.19÷
0.3=7.3
(245)
51.3÷
0.27=190
(246)
(247)
0.032=800
(248)
3.5=0.24
(249)
5.88÷
0.56=10.5
(250)
7.05÷
0.47=15
(251)
2.6÷
0.13=20
(252)
16÷
40=0.4
(253)
15÷
20=0.75
(254)
1.44÷
1.8=0.8
(255)
11.7÷
2.6=4.5
(256)
4.48÷
3.2=1.4
(257)
5.98÷
0.23=26
(258)
1.4=15
(259)
19.76÷
5.2=3.8
(260)
8.84÷
1.7=5.2
(261)
10.8÷
4.5=2.4
(262)
6.21÷
0.03=207
(263)
2.7÷
7.5=0.36
(264)
0.06=250
(265)
4.68÷
1.2=3.9
(266)
5.2÷
0.32=16.25
(267)
8.16÷
0.34=24
(268)
161÷
0.46=350
(269)
6÷
1.5=4
(270)
49.5÷
0.=11045
(271)
2.29÷
1.1=2.0818181…
(272)
153÷
7.2=21.25
(273)
23÷
3.3=6.969696…
(274)
5.7÷
9=0.6333…
(275)
5÷
8=0.625
(276)
6.64÷
3.3=2.0121212…
(277)
9.4÷
6=1.5666…
(278)
40.32÷
24=1.68
(279)
6.92×
0.84=5.8128
(280)
111÷
0.3=370
(281)
6.25=17.5
(282)
2.07÷
0.023=90
(283)
1.23÷
0.03=41
(284)
42÷
28=1.5
(285)
3.6=9
(286)
7.2÷
1.6+0.8
=4.5+0.8
=5.3
(287)
(16.8+1.47)÷
=18.27÷
=26.1
(288)
19.8÷
3.3=6
(289)
18×
0.45=8.1
(290)
0.75×
18÷
0.15
=13.5÷
=90
(291)
21.36÷
0.8-12.9
=26.7-12.9
=13.8
(292)
0.23÷
=9÷
=20
(293)
7.28+3.2÷
=7.28+1.28
=8.56
(294)
1.08×
0.8÷
0.27
=0.864÷
=3.2
(295)
2.05÷
0.82+33.6
=2.5+33.6
=36.1
(296)
44.28÷
0.9÷
4.1
=49.2÷
=12
(297)
9.07-22.78÷
=9.07-6.7
=2.37
(298)
40.5÷
0.81×
0.18
=50×
=9
(299)
(15÷
2.4)
=4.8×
6.25
=30
(300)
60.75÷
0.5
=8÷
=16
(301)
3.75÷
0.25-2.75
=15-2.75
=12.25
(302)x-0.36x=16
解:
0.64x=16
0.64x÷
0.64=16÷
0.64
x=25
(303)(100-3x)÷
2=8
(100-3x)÷
2×
2=8×
100-3x=16
100-3x+3x=16+3x
100=16+3x(可以不写)
16+3x=100
16+3x-16=100-16
3x=84
3x÷
3=84÷
3
x=28
(304)2x+23×
4=134
x=21
(305)3(x+2.1)=10.5
x=1.4
(306)8-4x=6
x=0.5
(307)(x-3)÷
2=7.5
x=18
(308)6x-x=7.5
X=1.5
(309)3x-8=25
X=11
(310)8+8x=88
X=10
(311)2x÷
0.95=1.8
X=0.855
(312)8(5x-6.2)=41.6
X=2.28
(313)4x+1.2×
5=24.4
X=4.6
(314)32-4x=16
X=4
(315)(75-5x)÷
5=15
X=0
(316)2(x-2.6)=8
X=6.6
(317)47-x=12.7
X=34.3
(318)x-47=12.7
X=59.7
(319)12.8÷
x=3.2
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