小数加减法专项练习200题.docx
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小数加减法专项练习200题.docx
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小数加减法专项练习200题
小数加减法专项练习200题(有答案)
(1)7.4+12.86
(10)12.42+0.48
(2)20-5.674
(11)0.56+11.534
(3)141.2-48.98
(12)44-22.13
(4)102+4.36
(13)91-22.035
(5)32.15-27.45
(14)52.6+21.237
(6)12.9+5.01
(15)9.15・2.18
(7)29.46・(9.46+3.8)
(16)3.85・1.5+1.32,
(17)15.4+6.87
(8)15.75+0.65-2.75+3.35
(18)
(9)65.71・4・99
3.56+27.84
(19)100・82.13=17.87
(29)5.9+28・65・16.57
(20)123.56-47.9+51.7
(30)57.5・3.25-16.75,
(21)2.7+3.1+2.9+3.2,
(31)6.02+3.6+1.98
(22)28.42+19.48
(32)1.29+3.7+2.71+6.3
(23)42.56+3.124
(33)3・07・0.38-1.62
(24)81・30.75
(34)3.25+1.79-0.59+1.75
(25)15.6十0.237
(35)7.5+4.9-6.1
(26)148.2・25・62・24.38
(36)14.8+7.9・4.8
(27)4.52-0.74・0・26
(37)2.608+2.84
(28)0.42+5.4+1.58+2.6
(38)6.07-3.869
(39)1.5-0.306
(49)120-17.83-2.17,
(40)76.8+26.82
(50)17.17-6.8-3.2-6.17
(41)102.07-37.257
(51)73.8-1.64-13.8-5.36
(42)48.64+18.6
(52)6.75・(0.9+3.75)
(43)54.7514.75,
(53)27.38-5.34+2.62-4.66
(44)4.68+14.79+5.32-10.79,
(54)35.72-4.9-(5.72+5.1)
(45)48.9-12・7・0・3,
(55)0.73・0.25-0.73+0.25
(46)56.4・39.7+24.3,
(56)5.3+0.1+5.3-0.1
(47)3.6-2.8+3.4-7.2,
(57)12.7-4.8-5.2.
(59)
(60)
(61)
(62)
(63)
(64)
(65)
(66)
(67)
(68)
4.58+2.39+(5.42+7.61)
(69)1+12.7+5.9+17.3
9.05・3.86-3.14
(70)
270-42.5・17.5
20・9.18・0.82
(71)
15.68・(7.78・4.32)-2.32,
6.53・(1.53+2.6)
(72)
0.9+9.9+99.9+999.9,
5.52・1.074・0.926
(73)
25.46・8.23-1.76,
4.21+1.04+0.79
(74)
9.4+0.3-6.4,
1.36+4.85+2.64+6.15
(75)
15.25+4.72+4.75+5.28,
83.7・12.83-0.17
(76)
34,823-(4.82+15.2),
4.32+5.43+6.68
(77)
12.7■4.8■5.2,
17.17・6.8-3.2,
(78)
3.1+25.78+6.9,
(80)2.15+8.73+1.27+7.85
(90)15.17-(3.6+4.9),
(81)11.87・(8・2+1.87),
(91)35.6+(12.6-4.4),
(82)5.42-3.87-1.13,
(92)16.4+3.5+83.6+166.5
(93)4.65・2.55-1.45,
(83)4・38・1・56+0.62・0.44,
(84)46・7・15.03-4.97
(94)1.28+0.86+38.72,
(85)4.52+0.61+1.39+6.48
(95)25.74・3・57・6.43,
(86)4・27・(1.96・1.73)
(96)14.5・4・68・5.32,
(97)0.485+0.64+3.36,
(87)7.27-(1.98+0.27),
(100)5.76+2.43+0.24+10.57,
(110)27.73-(4.73-1.85),
(101)9・28・(3・28+2・55),
(111)3.84+[26.5・(20-8.6)],
(102)9.5+4.85-6.13,
(112)7.38・5.14+3.62・2・86,
(103)10.75-1.86・2・75・3.16,
(113)5.86+13.08・9・27,
(104)1.3+0.94+0.06+7.7,
(114)25.4-(15.4-6.4),
(105)4.45+0.63+5.55,
(115)47.23・7.23・5.89,
(106)45.5・(0.98+5.5),
(116)4.45+0.63+5.55,
(107)0.96-0.28+0.04-0.72,
(117)5.28・(2.9+1.28),
(119)
(120)
(121)
(122)
(123)
(124)
(125)
(126)
(127)
(128)
0.96・0.28+0.04・0.72,
(129)13.67-(5.45+3.67),
9.42+7.39+1.58,
(130)
4.26+5.48-1.26+4.52,
18.4-1・6・5.4,
(131)
14,67+25.91+15.33+4.09,
75.7+39.4・23.86,
(132)
10.75-(2.4-0.86),
21.21+38.38-9.79,
(133)
9.61-4.38+0.35,
47.28+1.39+52.72,
(134)
3.87+4.92+1.13,
2・45・1.68+1.54,
(135)
46.24-8.66-1.34,
15-8.13-1.87,
(136)
21.9-9.22-0.78+8.1,
5.14+3.225・6.302,
(137)
35.47+39.88-12.37,
3.95+5.36-1.95,
(138)
93.21-5.99-14.01,
42.37-(12.37-9.78),
(150)
1.3+2.83+8.7+0.17,
38.78-19.59+41.22・30.41,
(151)
2.47・2.2-3.8+7.53,
1.9+19.9+199.9+0.3
(152)
6.89+4.7+2.11+5.3,
429+31.1+2.04,
(153)
7.46・2.37-1.63,
100・27.2・42.8,
(154)
14-(3.65+0.24),
9・(3.02+1.25),
(155)
70.8-1.25-1.75,
1・8・1.57+0.2,
(156)
5.81+8.3+4.19+11.7,
5.03・2.5+0.96,
(157)
4.2+7.64+5.8+2.36,
(140)
(141)
(142)
(143)
(144)
(145)
(146)
(147)
6.8+5.26+3.74+3.2,
(169)
15.19+3.36+4.64+4.81,
6.21・3.8+2.2,
(170)
4.7+7.69+5.3+2.31,
6.03+3.7+2.97,
(171)
53.78・13.6-37.4+6.22,
17.43・6.57・2.43,
(172)
60・(21.5■&8)+7.3,
20.47・(1.47+6.8),
(173)
9.5+4.85-6.13»
13.26+4.71+3.47+5.29,
(174)
75.8-(15.3-4.8),
22.74+8.68・13.74,
(175)
51.27・8.66-1.34,
12.56・6.64・3.36,
(176)
28.4-3.96-1.04+4.6,
45.5・(0.98+5.5),
(177)
70.8・7.25-1.75
(159)
(160)
(161)
(162)
(163)
(164)
(165)
(166)
(167)
(168)13.6+7.94+6.4,
(178)5.81+8.3+4.19+11.7
(179)794-198,
(189)15.37・7・59+5・73・12.41,
6756-193・207,
(190)
11.72・7.85-(1.26+0.46),
0.9+1.08+0.92+0.1,
(191)
15.37+28.44+12.56,
13.59-6.91-0.09,
(192)
12.64・(3.96+4.64),
4.58+3.38+(5.48+6.62)
(193)
36.26-4.78+3.74,
73.75・(4.3+8.75)
(194)
7.34+7.57+12.66+6.43,
5・(4.19・2.83),
(195)
78.65-23.12-14.88,
1.39+0.72+0.61+3.28,
(195)
4.58+2.39+(5.42+7.61),
8・3・7・6.3,
(196)
8.27+5.84+1.73+2.16,
&28・(1.28+3.7),
(197)
18.51-9.08-0.92,.
(180)
(181)
(182)
(183)
(184)
(185)
(186)
(187)
(224)10-4.44-5.56,
(218)75.36-24.9+24.64-25.1,
(219)12.56-6.64-3.36,
(225)32.63+7.89-6.4,
(220)45.5・(0.98+5.5),
(226)3.97+0.7-1.32,
(221)6+7.94+6.4,
(227)30-(3.8+0.75),
(222)5.41+3.46・2・46,
(228)75.6-(14.3-8.3),
(223)2・03・0・18-2.82+7.97,
参考答案:
(1)7.4+12.86=20.26;
7.4
十12.86
20.26
(2)20・5.674=14.326:
20
-5.674
14.326
(3)141.2-48.98=92.22;
141.2
-4&98
9222
(4)102+4.36=106.36;
102
-4.36
106.36
(5)32.15・27.45=4.7;
3215
-27.45
4.7验算:
21A5亠4.7
32.15
(6)12.9+5.01=17.91;
12.9
十5.01
17.91
验算:
17.91
・129
(7)29.46-(9.46+3.8),
=29.46・9.46・3.8,
=20・3.8,
=16.2;
(8)15.75+0.65-2.75+3.35,
=(15.75・2.75)+(0.65+3.35),=13+4,
=17;
(9)65.71・4.99,
=65.71・(5・0.01),
=65.71-5+0.01,
=60.71+0.01,
二60.72;
(10)12.42+0.48=12.9,
(11)0.56+11.534=12.094,
(12)44・22.13=21.87,
44
-22.13
21.87
(13)91・22.035=68.965,
91
-22.035
6殳965
(14)52.6+21.237=73.837,
526
+21.237
73.837
(15)9.15-2.18=6.97•
9.15
-2.18
07
(16)3・83・1.5+1.32,
=2.35+1.32,
=3.67;
(17)15.4+6.87=22.27
15.4
+6.87
22.27粧昇:
22.27
一15.4
6.87
(18)3.56+27.84=31.4
3.56
+27.84
31.40验算:
31.4
-27.84
3.56
(19)100・82.13=17.87
100
-82.13
17.87验算:
17.8+82.1
100.00
(20)123.56-47.9+51.7=127.36
123.56
-47.9
75.66十51.7
127.36
验算:
127.36
-51.7
75.66+47.9
123.56
(21)2.7+3.1+2.9+3.2,
=2.7+(3.1+2.9)+3.2,
=2.7+6+3.2,
=11.9.
(22)28.42+19.48=47.9
28.4:
2
+19.4:
8
"90验算:
47.9
-28.42
19.48
(23)42.56+3.124=45.684
42.56
+3.124:
4
验算:
4
42.560
(24)81-30.75=50.2581
-30.75
50.25验算:
50.25
+30.75
81.00
(25)15.6+0.237=15.837
15.6
+0.237
86
5.5.
0.237
(26)148.2・25・62・24.38=14&2・(25.62+24.38),
=148.2・50,
二98.2.
(27)4.52・0.74・0.26
二4.52・(0.74+0.26)
二4.52・1
=3.52;
(28)0.42+5.4+1.58+2.6
=(0.42+1.58)+(5.4+2.6)
=2+8
=10;
(29)5.9+28.65・16.57=17.98;
28.65
+5.9
34.55
-16.57
17.98
(30)57.5・3.25・16.75,
=57.5・(3.25+16.75),
=57.5・20,
=37.5;
(31)6.02+3.6+1.98
二6.02+1.98+3.6,
=8+3.6,
=11.6;
(32)1.29+3.7+2.71+6.3
=(1.29+2.71)+(3.7+6.3),
二4+10,
=14;
(33)3.07・0.38-1.62
=3.07・(0.38+1.62),
=3.07・2,
=1.07;
(34)3.25+1.79・0.59+1.75
=(3.25+1.75)+(1.79・0.59),=5+1.2,
二6.2;
(35)7.5+4.9・6.1
=12.4・6.1,
=6.3;
(36)14.8+7.9・4.8
=14.8・4.8+7.9,
=10+7.9
=17.9
(37)2.608+2.84=5.448,
2.608
+2.84
5.448
(38)6.07・3.869二2.201,
6・07
-3.869
2.201
(39)1.5-0.306二1.194,
1.5
-0.306
1.194
(40)76.8+26.82=103.62,
76.8
+26.82
103.62
(41)102.07・37.257二64.813,
102.07
-37.257
64.813
(42)48.64+18.6二67.24.
48.64
+18.6
67.24
(43)54.75・5.25・14.75,
=54.75・(14.75+5.25),
=54.75・20,
=34.75;
(44)4.68+14.79+5.32-10.79,
=(4.68+5.32)+(14.79・10.79),
=10+4,
=14;
(45)48.9・12.7・0.3,
=48.9・(12.7+0.3),
=48.9・13,
=35.9;
(46)56.4・39.7+24.3,
=16.7+24.3,
二41;
(47)3.6・2.8+3.4・7.2,
=(3.6+13.4)・(2.8+7.2),
=17・10,
=7;
(48)3.67+18.5+6.33,
=(3.67+6.33)+18.5,
=10+18.5,
=28.5;
(49)120-17.83・2.17,
=120-17.83・2.17,
=120・(17.83+2.17),
=120-20,
=100;
(50)17.17・6.8・3.2・6.17
=(17.17・6.17)・(6.8+3.2),=11・10,
=1;
(51)73.8・1.64・13.8・5.36=73.8・13.8・(1.64+5.36),二60・7,
=53;
(52)6.75・(0.9+3.75)
二6.75・3.75・0.9,
=3・0.9,
=2.1;
(53)27.38・5.34+2.62・4.66
=22.04+2.62・4.66,
=24.66・4.66,
二20;
(54)35.72・4.9・(5.72+5.1)
=35.72・(4.9+5.72+5.1),
=35.72・15.72,
=20;
(55)0.73・0.25・0.73+0.25
=0.75・0.75・0.25+0.25,
二0・0.25+0.25,
=0・0,
=0:
(56)5.3+0.1+5.3-0.1
=5.3+5.3+0.1・0.1,
=10.6+0.1・0.1,
=10.7・0.1,
=10.6;
(57)12.7・4.8・5.2.
二12.7・(4.8+5.2);
=12.7・10,
=2.7.
(58)23.25・6.75-3.25
=23.25・(6.75+3.25),
=23.25・10,
=13.25.
(59)4.58+2.39+(5.42+7.61)
=(4.58+5.42)+(2.39+7.61)=10+10,
=20:
(60)9.03・3.86・3.14,
二9.03・(3.86+3.14),
二9.03・7,
=2.05;
(61)20・9.18・0.82,
=20・(9.18+0.82),
=20・10,
=10.
(62)6.53・(1.53+2.6),
-6.53-1.53-2.6,
=4・2.6,
=1.4.
(63)5.52・1.074・0.926,
二5.52・(1.074+0.926),
二5.52・2,
=3.52.
(64)4.21+1.04+0.79,
二4.21+0.79+1.04,
=5+1.04,
二6.04
(65)1.36+4.85+2.64+6.15,
=(1.36+2.64)+(4.85+6.15),
二4+11,
=15;
(66)83.7・12.83・0.17,
二83.7・(12.83+0.17),
二83.7・13,
=70.7:
(67)4.32+5.43+6.68,
二4.32+6.68+5.43,
=11+5.43,
=16.43;
(68)17.17・6.8・3.2,
=17.17・(6.8+3.2),
=17.17・10,
=7.17;
(6
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