小数加减法专项练习题有答案ok.docx
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小数加减法专项练习题有答案ok
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,
(8)15.75+0.65﹣2.75+3.35(17)15.4+6.87
(9)65.71﹣4.99(18)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
2/22
(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)54.75﹣5.25﹣14.75,(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.
(48)3.67+18.5+6.33,(58)23.25﹣6.75﹣3.25
3/22
(59)4.58+2.39+(5.42+7.61)(69)1+12.7+5.9+17.3
(60)9.05﹣3.86﹣3.14(70)270﹣42.5﹣17.5
(61)20﹣9.18﹣0.82(71)15.68﹣(7.78﹣4.32)﹣2.32,
(62)6.53﹣(1.53+2.6)(72)0.9+9.9+99.9+999.9,
(63)5.52﹣1.074﹣0.926(73)25.46﹣8.23﹣1.76,
(64)4.21+1.04+0.79(74)9.4+0.3﹣6.4,
(65)1.36+4.85+2.64+6.15(75)15.25+4.72+4.75+5.28,
(66)83.7﹣12.83﹣0.17(76)34.823﹣(4.82+15.2),
(67)4.32+5.43+6.68(77)12.7﹣4.8﹣5.2,
(68)17.17﹣6.8﹣3.2,(78)3.1+25.78+6.9,
4/22
(79)73.8﹣1.64﹣13.8﹣5.36,(89)12.8﹣(4.38+1.614)
(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
(83)4.38﹣1.56+0.62﹣0.44,(93)4.65﹣2.55﹣1.45,
(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,
(87)7.27﹣(1.98+0.27),(97)0.485+0.64+3.36,
(88)13.7+8.65﹣9.628,(98)72.51﹣9.34﹣12.66,
5/22
(99)14.02﹣4.5+0.98,(109)0.6+0.94﹣0.208,
(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),
(108)12.7+12.5+0.5,(118)5.25+7.86﹣2.86+4.75,
6/22
(119)0.96﹣0.28+0.04﹣0.72,(129)13.67﹣(5.45+3.67),
(120)9.42+7.39+1.58,(130)4.26+5.48﹣1.26+4.52,
(121)18.4﹣1.6﹣5.4,(131)14.67+25.91+15.33+4.09,
(122)75.7+39.4﹣23.86,(132)10.75﹣(2.4﹣0.86),
(123)21.21+38.38﹣9.79,(133)9.61﹣4.38+0.35,
(124)47.28+1.39+52.72,(134)3.87+4.92+1.13,
(125)2.45﹣1.68+1.54,(135)46.24﹣8.66﹣1.34,
(126)15﹣8.13﹣1.87,(136)21.9﹣9.22﹣0.78+8.1,
(127)5.14+3.225﹣6.302,(137)35.47+39.88﹣12.37,
(128)3.95+5.36﹣1.95,(138)93.21﹣5.99﹣14.01,
7/22
(139)15.37+28.94+4.63+1.06,(149)25﹣4.7+5.3,
(140)42.37﹣(12.37﹣9.78),(150)1.3+2.83+8.7+0.17,
(141)38.78﹣19.59+41.22﹣30.41,(151)2.47﹣2.2﹣3.8+7.53,
(142)1.9+19.9+199.9+0.3(152)6.89+4.7+2.11+5.3,
(143)429+31.1+2.04,(153)7.46﹣2.37﹣1.63,
(144)100﹣27.2﹣42.8,(154)14﹣(3.65+0.24),
(145)9﹣(3.02+1.25),(155)70.8﹣1.25﹣1.75,
(146)1.8﹣1.57+0.2,(156)5.81+8.3+4.19+11.7,
(147)5.03﹣2.5+0.96,(157)4.2+7.64+5.8+2.36,
(148)35.72﹣(5.9+5.72),(158)14.28﹣2.63﹣7.37,
8/22
(159)6.8+5.26+3.74+3.2,(169)15.19+3.36+4.64+4.81,
(160)6.21﹣3.8+2.2,(170)4.7+7.69+5.3+2.31,
(161)6.03+3.7+2.97,(171)53.78﹣13.6﹣37.4+6.22,
(162)17.43﹣6.57﹣2.43,(172)60﹣(21.5﹣8.8)+7.3,
(163)20.47﹣(1.47+6.8),(173)9.5+4.85﹣6.13,
(164)13.26+4.71+3.47+5.29,(174)75.8﹣(15.3﹣4.8),
(165)22.74+8.68﹣13.74,(175)51.27﹣8.66﹣1.34,
(166)12.56﹣6.64﹣3.36,(176)28.4﹣3.96﹣1.04+4.6,
(167)45.5﹣(0.98+5.5),(177)70.8﹣7.25﹣1.75
(168)13.6+7.94+6.4,(178)5.81+8.3+4.19+11.7
9/22
(179)794﹣198,(189)15.37﹣7.59+5.73﹣12.41,
(180)6756﹣193﹣207,(190)11.72﹣7.85﹣(1.26+0.46),
(181)0.9+1.08+0.92+0.1,(191)15.37+28.44+12.56,
(182)13.59﹣6.91﹣0.09,(192)12.64﹣(3.96+4.64),
(183)4.58+3.38+(5.48+6.62)(193)36.26﹣4.78+3.74,
(184)73.75﹣(4.3+8.75)(194)7.34+7.57+12.66+6.43,
(185)5﹣(4.19﹣2.83),(195)78.65﹣23.12﹣14.88,
(186)1.39+0.72+0.61+3.28,(195)4.58+2.39+(5.42+7.61),
(187)8﹣3.7﹣6.3,(196)8.27+5.84+1.73+2.16,
(188)8.28﹣(1.28+3.7),(197)18.51﹣9.08﹣0.92,.
10/22
(198)0.09+0.6+5.91+3.4,(208)5.81+8.3+4.19+11.7,
(199)7.85+6.76+2.15(209)3.78﹣1.46+1.54,
(200)18.43﹣3.76﹣7.24(210)8.45﹣(5.45+2.98);,
(201)21.65+(4.8﹣3.65)(211)3.01+8.2+6.99+1.8,
(202)9.64﹣(4.64﹣1.23)(212)4.3﹣(5.98﹣5.7),
(203)2.7+17.6+3.3﹣5.6(213)5.52﹣0.55﹣0.45,
(204)9.87﹣3.5+2.13﹣8.5(214)19.6﹣26.72+80.4﹣3.28,
(205)5.64+4.97+0.03,(215)27.5﹣10.8﹣0.2,
(206)10.93﹣3.74﹣4.26,(216)43.5+18﹣13.5,
(207)10﹣6.8﹣3.2,(217)63.5﹣(43.5+20),
11/22
(218)75.36﹣24.9+24.64﹣25.1,(224)10﹣4.44﹣5.56,
(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,
12/22
参考答案:
(1)7.4+12.86=20.26;
(2)20﹣5.674=14.326;
(3)141.2﹣48.98=92.22;
(4)102+4.36=106.36;
(5)32.15﹣27.45=4.7;
验算:
(6)12.9+5.01=17.91;
验算:
(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,
=60.72;
(10)12.42+0.48=12.9,
(11)0.56+11.534=12.094,
(12)44﹣22.13=21.87,
(13)91﹣22.035=68.965,
(14)52.6+21.237=73.837,
(15)9.15﹣2.18=6.97.
(16)3.85﹣1.5+1.32,
=2.35+1.32,
=3.67;
(17)15.4+6.87=22.27
验算:
(18)3.56+27.84=31.4
验算:
(19)100﹣82.13=17.87
验算:
(20)123.56﹣47.9+51.7=127.36
13/22
=148.2﹣50,
=98.2.
(27)4.52﹣0.74﹣0.26
=4.52﹣(0.74+0.26)
=4.52﹣1
验算:
=3.52;
(28)0.42+5.4+1.58+2.6
=(0.42+1.58)+(5.4+2.6)
=2+8
=10;
(21)2.7+3.1+2.9+3.2,
(29)5.9+28.65﹣16.57=17.98;
=2.7+(3.1+2.9)+3.2,
=2.7+6+3.2,
=11.9.
(22)28.42+19.48=47.9
(30)57.5﹣3.25﹣16.75,
=57.5﹣(3.25+16.75),
验算:
=57.5﹣20,
=37.5;
(31)6.02+3.6+1.98
(23)42.56+3.124=45.684
=6.02+1.98+3.6,
=8+3.6,
=11.6;
(32)1.29+3.7+2.71+6.3
验算:
=(1.29+2.71)+(3.7+6.3),
=4+10,
=14;
(33)3.07﹣0.38﹣1.62
(24)81﹣30.75=50.25
=3.07﹣(0.38+1.62),
=3.07﹣2,
=1.07;
(34)3.25+1.79﹣0.59+1.75
验算:
=(3.25+1.75)+(1.79﹣0.59),
=5+1.2,
=6.2;
(35)7.5+4.9﹣6.1
(25)15.6十0.237=15.837
=12.4﹣6.1,
=6.3;
(36)14.8+7.9﹣4.8
=14.8﹣4.8+7.9,
验算:
=10+7.9
=17.9
(37)2.608+2.84=5.448,
(26)148.2﹣25.62﹣24.38=148.2﹣(25.62+24.38),
14/22
(38)6.07﹣3.869=2.201,
=(17.17﹣6.17)﹣(6.8+3.2),
=11﹣10,
=1;
(51)73.8﹣1.64﹣13.8﹣5.36
(39)1.5﹣0.306=1.194,
=73.8﹣13.8﹣(1.64+5.36),
=60﹣7,
=53;
(52)6.75﹣(0.9+3.75)
(40)76.8+26.82=103.62,
=6.75﹣3.75﹣0.9,
=3﹣0.9,
=2.1;
(53)27.38﹣5.34+2.62﹣4.66
(41)102.07﹣37.257=64.813,
=22.04+2.62﹣4.66,
=24.66﹣4.66,
=20;
(54)35.72﹣4.9﹣(5.72+5.1)
(42)48.64+18.6=67.24.
=35.72﹣(4.9+5.72+5.1),
=35.72﹣15.72,
=20;
(55)0.73﹣0.25﹣0.73+0.25
(43)54.75﹣5.25﹣14.75,
=0.75﹣0.75﹣0.25+0.25,
=54.75﹣(14.75+5.25),
=0﹣0.25+0.25,
=54.75﹣20,
=0﹣0,
=34.75;
=0;
(44)4.68+14.79+5.32﹣10.79,
(56)5.3+0.1+5.3﹣0.1
=(4.68+5.32)+(14.79﹣10.79),
=5.3+5.3+0.1﹣0.1,
=10+4,
=10.6+0.1﹣0.1,
=14;
=10.7﹣0.1,
(45)48.9﹣12.7﹣0.3,
=10.6;
=48.9﹣(12.7+0.3),
(57)12.7﹣4.8﹣5.2.
=48.9﹣13,
=12.7﹣(4.8+5.2);
=35.9;
=12.7﹣10,
(46)56.4﹣39.7+24.3,
=2.7.
=16.7+24.3,
(58)23.25﹣6.75﹣3.25
=41;
=23.25﹣(6.75+3.25),
(47)3.6﹣2.8+3.4﹣7.2,
=23.25﹣10,
=(3.6+13.4)﹣(2.8+7.2),
=13.25.
=17﹣10,
(59)4.58+2.39+(5.42+7.61)
=7;
=(4.58+5.42)+(2.39+7.61)
(48)3.67+18.5+6.33,
=10+10,
=(3.67+6.33)+18.5,
=20;
=10+18.5,
(60)9.05﹣3.86﹣3.14,
=28.5;
=9.05﹣(3.86+3.14),
(49)120﹣17.83﹣2.17,
=9.05﹣7,
=120﹣17.83﹣2.17,
=2.05;
=120﹣(17.83+2.17),
(61)20﹣9.18﹣0.82,
=120﹣20,
=20﹣(9.18+0.82),
=100;
=20﹣10,
(50)17.17﹣6.8﹣3.2﹣6.17
=10.
15/22
(62)6.53﹣(1.53+2.6),
=15.45;
=6.53﹣1.53﹣2.6,
(74)9.4+0.3﹣6.4,
=4﹣2.6,
=(9.4﹣6.4)+0.3,
=1.4.
=3+0.3,
(63)5.52﹣1.074﹣0.926,
=3.3;
=5.52﹣(1.074+0.926),
(75)15.25+4.72+4.75+5.28,
=5.52﹣2,
=(15.25+4.75)+(4.72+5.28),
=3.52.
=20+10,
(64)4.21+1.04+0.79,
=30;
=4.21+0.79+1.04,
(76)34.823﹣(4.82+15.2),
=5+1.04,
=34.823﹣4.82﹣15.2,
=6.04
=30.003﹣15.2,
(65)1.36+4.85+2.64+6.15,
=14.803;
=(1.36+2.64)+(4.85+6.15),
(77)12.7﹣4.8﹣5.2,
=4+11,
=12.7﹣(4.8+5.2),
=15;
=12.7﹣10,
(66)83.7﹣12.83﹣0.17,
=2.7;
=83.7﹣(12.83+0.17),
(78)3.1+25.78+6.9,
=83.7﹣13,
=(3.1+6.9)+25.78,
=70.7;
=10+25.78,
(67)4.32+5.43+6.68,
=35.78;
=4.32+6.68+5.43,
(79)73.8﹣1.64﹣13.8﹣5.36,
=11+5.43,
=(73.8﹣13.8)﹣(1.64+5.36),
=16.43;
=60﹣7,
(68)17.17﹣6.8﹣3.2,
=53
=17.17﹣(6.8+3.2),
(80)2.15+8.73+1.27+7.85
=17.17﹣10,
=(2.15+7.85)+(8.73+1.27),
=7.17;
=10+10,
(69)1+12.7+5.9+17.3
=20;
=1+(12.7+17.3)+5.9,
(81)11.87﹣(8.2+1.87),
=1+30+5.9,
=11.87﹣1.87﹣8.2,
=36.9;
=10﹣8.2,
(70)270﹣42.5﹣17.5
=1.8;
=270﹣(42.5+17.5),
(82)5.42﹣3.87﹣1.13,
=270﹣60,
=5.42﹣5,
=210;
=0.42;
(71)15.68﹣(7.78﹣4.32)﹣2.32,
(83)4.38﹣1.56+0.62﹣0.44,
=15.68﹣7.78+4.32﹣2.32,
=(4.38+0.62)﹣(1.56+0.44),
=(15.68+4.32)﹣(7.78+2.32),
=5﹣2,
=20﹣10,
=3;
=10;
(84)46.7﹣15.03﹣4.97
(72)0.9+9.9+99.9+999.9,
=46.7﹣(15.03+4.97),
=1﹣0.1+10﹣0.1+100﹣0.1+10