小数加减法专项练习200题有答案.docx
《小数加减法专项练习200题有答案.docx》由会员分享,可在线阅读,更多相关《小数加减法专项练习200题有答案.docx(48页珍藏版)》请在冰豆网上搜索。
小数加减法专项练习200题有答案
小数加减法专项练习200题(有答案)
(1)7.4+12.86
(2)20﹣5.674
(3)141.2﹣48.98
(4)102+4.36
(5)32.15﹣27.45
(6)12.9+5.01
(7)29.46﹣(9.46+3.8)
(8)15.75+0.65﹣2.75+3.35
(9)65.71﹣4.99
(10)12.42+0.48
(11)0.56+11.534
(12)44﹣22.13
(13)91﹣22.035
(14)52.6+21.237
(15)9.15﹣2.18
(16)3.85﹣1.5+1.32.
(17)15.4+6.87
(18)3.56+27.84
(19)100﹣82.13=17.87
(20)123.56﹣47.9+51.7
(21)2.7+3.1+2.9+3.2.
(22)28.42+19.48
(23)42.56+3.124
(24)81﹣30.75
(25)15.6十0.237
(26)148.2﹣25.62﹣24.38
(27)4.52﹣0.74﹣0.26
(28)0.42+5.4+1.58+2.6
(29)5.9+28.65﹣16.57
(30)57.5﹣3.25﹣16.75.
(31)6.02+3.6+1.98
(32)1.29+3.7+2.71+6.3
(33)3.07﹣0.38﹣1.62
(34)3.25+1.79﹣0.59+1.75
(35)7.5+4.9﹣6.1
(36)14.8+7.9﹣4.8
(37)2.608+2.84
(38)6.07﹣3.869
(39)1.5﹣0.306
(40)76.8+26.82
(41)102.07﹣37.257
(42)48.64+18.6
(43)54.75﹣5.25﹣14.75.
(44)4.68+14.79+5.32﹣10.79.
(45)48.9﹣12.7﹣0.3.
(46)56.4﹣39.7+24.3.
(47)3.6﹣2.8+3.4﹣7.2.
(48)3.67+18.5+6.33.
(49)120﹣17.83﹣2.17.
(50)17.17﹣6.8﹣3.2﹣6.17
(51)73.8﹣1.64﹣13.8﹣5.36
(52)6.75﹣(0.9+3.75)
(53)27.38﹣5.34+2.62﹣4.66
(54)35.72﹣4.9﹣(5.72+5.1)
(55)0.73﹣0.25﹣0.73+0.25
(56)5.3+0.1+5.3﹣0.1
(57)12.7﹣4.8﹣5.2.
(58)23.25﹣6.75﹣3.25
(59)4.58+2.39+(5.42+7.61)
(60)9.05﹣3.86﹣3.14
(61)20﹣9.18﹣0.82
(62)6.53﹣(1.53+2.6)
(63)5.52﹣1.074﹣0.926
(64)4.21+1.04+0.79
(65)1.36+4.85+2.64+6.15
(66)83.7﹣12.83﹣0.17
(67)4.32+5.43+6.68
(68)17.17﹣6.8﹣3.2.
(69)1+12.7+5.9+17.3
(70)270﹣42.5﹣17.5
(71)15.68﹣(7.78﹣4.32)﹣2.32.
(72)0.9+9.9+99.9+999.9.
(73)25.46﹣8.23﹣1.76.
(74)9.4+0.3﹣6.4.
(75)15.25+4.72+4.75+5.28.
(76)34.823﹣(4.82+15.2).
(77)12.7﹣4.8﹣5.2.
(78)3.1+25.78+6.9.
(79)73.8﹣1.64﹣13.8﹣5.36.
(80)2.15+8.73+1.27+7.85
(81)11.87﹣(8.2+1.87).
(82)5.42﹣3.87﹣1.13.
(83)4.38﹣1.56+0.62﹣0.44.
(84)46.7﹣15.03﹣4.97
(85)4.52+0.61+1.39+6.48
(86)4.27﹣(1.96﹣1.73)
(87)7.27﹣(1.98+0.27).
(88)13.7+8.65﹣9.628.
(89)12.8﹣(4.38+1.614)
(90)15.17﹣(3.6+4.9).
(91)35.6+(12.6﹣4.4).
(92)16.4+3.5+83.6+166.5
(93)4.65﹣2.55﹣1.45.
(94)1.28+0.86+38.72.
(95)25.74﹣3.57﹣6.43.
(96)14.5﹣4.68﹣5.32.
(97)0.485+0.64+3.36.
(98)72.51﹣9.34﹣12.66.
(99)14.02﹣4.5+0.98.
(100)5.76+2.43+0.24+10.57.
(101)9.28﹣(3.28+2.55).
(102)9.5+4.85﹣6.13.
(103)10.75﹣1.86﹣2.75﹣3.16.
(104)1.3+0.94+0.06+7.7.
(105)4.45+0.63+5.55.
(106)45.5﹣(0.98+5.5).
(107)0.96﹣0.28+0.04﹣0.72.
(108)12.7+12.5+0.5.
(109)0.6+0.94﹣0.208.
(110)27.73﹣(4.73﹣1.85).
(111)3.84+[26.5﹣(20﹣8.6)].
(112)7.38﹣5.14+3.62﹣2.86.
(113)5.86+13.08﹣9.27.
(114)25.4﹣(15.4﹣6.4).
(115)47.23﹣7.23﹣5.89.
(116)4.45+0.63+5.55.
(117)5.28﹣(2.9+1.28).
(118)5.25+7.86﹣2.86+4.75.
(119)0.96﹣0.28+0.04﹣0.72.
(120)9.42+7.39+1.58.
(121)18.4﹣1.6﹣5.4.
(122)75.7+39.4﹣23.86.
(123)21.21+38.38﹣9.79.
(124)47.28+1.39+52.72.
(125)2.45﹣1.68+1.54.
(126)15﹣8.13﹣1.87.
(127)5.14+3.225﹣6.302.
(128)3.95+5.36﹣1.95.
(129)13.67﹣(5.45+3.67).
(130)4.26+5.48﹣1.26+4.52.
(131)14.67+25.91+15.33+4.09.
(132)10.75﹣(2.4﹣0.86).
(133)9.61﹣4.38+0.35.
(134)3.87+4.92+1.13.
(135)46.24﹣8.66﹣1.34.
(136)21.9﹣9.22﹣0.78+8.1.
(137)35.47+39.88﹣12.37.
(138)93.21﹣5.99﹣14.01.
(139)15.37+28.94+4.63+1.06.
(140)42.37﹣(12.37﹣9.78).
(141)38.78﹣19.59+41.22﹣30.41.
(142)1.9+19.9+199.9+0.3
(143)429+31.1+2.04.
(144)100﹣27.2﹣42.8.
(145)9﹣(3.02+1.25).
(146)1.8﹣1.57+0.2.
(147)5.03﹣2.5+0.96.
(148)35.72﹣(5.9+5.72).
(149)25﹣4.7+5.3.
(150)1.3+2.83+8.7+0.17.
(151)2.47﹣2.2﹣3.8+7.53.
(152)6.89+4.7+2.11+5.3.
(153)7.46﹣2.37﹣1.63.
(154)14﹣(3.65+0.24).
(155)70.8﹣1.25﹣1.75.
(156)5.81+8.3+4.19+11.7.
(157)4.2+7.64+5.8+2.36.
(158)14.28﹣2.63﹣7.37.
(159)6.8+5.26+3.74+3.2.
(160)6.21﹣3.8+2.2.
(161)6.03+3.7+2.97.
(162)17.43﹣6.57﹣2.43.
(163)20.47﹣(1.47+6.8).
(164)13.26+4.71+3.47+5.29.
(165)22.74+8.68﹣13.74.
(166)12.56﹣6.64﹣3.36.
(167)45.5﹣(0.98+5.5).
(168)13.6+7.94+6.4.
(169)15.19+3.36+4.64+4.81.
(170)4.7+7.69+5.3+2.31.
(171)53.78﹣13.6﹣37.4+6.22.
(172)60﹣(21.5﹣8.8)+7.3.
(173)9.5+4.85﹣6.13.
(174)75.8﹣(15.3﹣4.8).
(175)51.27﹣8.66﹣1.34.
(176)28.4﹣3.96﹣1.04+4.6.
(177)70.8﹣7.25﹣1.75
(178)5.81+8.3+4.19+11.7
(179)794﹣198.
(180)6756﹣193﹣207.
(181)0.9+1.08+0.92+0.1.
(182)13.59﹣6.91﹣0.09.
(183)4.58+3.38+(5.48+6.62)
(184)73.75﹣(4.3+8.75)
(185)5﹣(4.19﹣2.83).
(186)1.39+0.72+0.61+3.28.
(187)8﹣3.7﹣6.3.
(188)8.28﹣(1.28+3.7).
(189)15.37﹣7.59+5.73﹣12.41.
(190)11.72﹣7.85﹣(1.26+0.46).
(191)15.37+28.44+12.56.
(192)12.64﹣(3.96+4.64).
(193)36.26﹣4.78+3.74.
(194)7.34+7.57+12.66+6.43.
(195)78.65﹣23.12﹣14.88.
(195)4.58+2.39+(5.42+7.61).
(196)8.27+5.84+1.73+2.16.
(197)18.51﹣9.08﹣0.92..
(198)0.09+0.6+5.91+3.4.
(199)7.85+6.76+2.15
(200)18.43﹣3.76﹣7.24
(201)21.65+(4.8﹣3.65)
(202)9.64﹣(4.64﹣1.23)
(203)2.7+17.6+3.3﹣5.6
(204)9.87﹣3.5+2.13﹣8.5
(205)5.64+4.97+0.03.
(206)10.93﹣3.74﹣4.26.
(207)10﹣6.8﹣3.2.
(208)5.81+8.3+4.19+11.7.
(209)3.78﹣1.46+1.54.
(210)8.45﹣(5.45+2.98);.
(211)3.01+8.2+6.99+1.8.
(212)4.3﹣(5.98﹣5.7).
(213)5.52﹣0.55﹣0.45.
(214)19.6﹣26.72+80.4﹣3.28.
(215)27.5﹣10.8﹣0.2.
(216)43.5+18﹣13.5.
(217)63.5﹣(43.5+20).
(218)75.36﹣24.9+24.64﹣25.1.
(219)12.56﹣6.64﹣3.36.
(220)45.5﹣(0.98+5.5).
(221)6+7.94+6.4.
(222)5.41+3.46﹣2.46.
(223)2.03﹣0.18﹣2.82+7.97.
(224)10﹣4.44﹣5.56.
(225)32.63+7.89﹣6.4.
(226)3.97+0.7﹣1.32.
(227)30﹣(3.8+0.75).
(228)75.6﹣(14.3﹣8.3).
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
验算:
(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
验算:
(23)42.56+3.124=45.684
验算:
(24)81﹣30.75=50.25
验算:
(25)15.6十0.237=15.837
验算:
(26)148.2﹣25.62﹣24.38
=148.2﹣(25.62+24.38).
=148.2﹣50.
=98.2.
(27)4.52﹣0.74﹣0.26
=4.52﹣(0.74+0.26)
=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;
(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
=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).
=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.
=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.
(38)6.07﹣3.869=2.201.
(39)1.5﹣0.306=1.194.
(40)76.8+26.82=103.62.
(41)102.07﹣37.257=64.813.
(42)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.
=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).
=60﹣7.
=53;
(52)6.75﹣(0.9+3.75)
=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.
=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.
=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.
=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)9.05﹣3.86﹣3.14.
=9.05﹣(3.86+3.14).
=9.05﹣7.
=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.
=5.52﹣(1.074+0.926).
=5.52﹣2.
=3.52.
(64)4.21+1.04+0.79.
=4.21+0.79+1.04.
=5+1.04.
=6.04
(65)1.36+4.85+2.64+6.15.
=(1.36+2.64)+(4.85+6.15).
=4+11.
=15;
(66)83.7﹣12.83﹣0.17.
=83.7﹣(12.83+0.17).
=83.7﹣13.
=70.7;
(67)4.32+5.43+6.68.
=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;
(69)1+12.7+5.9+17.3
=1+(12.7+17.3)+5.9.
=1+30+5.9.
=36.9;
(70)270﹣42.5﹣17.5
=270﹣(42.5+17.5).
=270﹣60.
=210;
(71)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;
(72)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
(73)25.46﹣8.23﹣1.76.
=25.46﹣(8.23+1.76).
=25.46﹣9.99
=15.45;
(74)9.4+0.3﹣6.4.
=(9.4﹣6.4)+0.3.
=3+0.3.
=3.3;
(75)15.25+4.72+4.75+5.28.
=(15.25+4.75)+(4.72+5.28).
=20+10.
=30;
(76)34.823﹣(4.82+15.2).
=34.823﹣4.82﹣15.2.
=30.003﹣15.2.
=14.803;
(77)12.7﹣4.8﹣5.2.
=12.7﹣(4.8+5.2).
=12.7﹣10.
=2.7;
(78)3.1+25.78+6.9.
=(3.1+6.9)+25.78.
=10+25.78.
=35.78;
(79)73.8﹣1.64﹣13.8﹣5.36.
=(73.8﹣13.8)﹣(1.64+5.36).
=60﹣7.
=53
(80)2.15+8.73+1.27+7.85
=(2.15+7.85)+(8.73+1.27).
=10+10.
=20;
(81)11.87﹣(8.2+1.87).
=11.87﹣1.87﹣8.2.
=10﹣8.2.
=1.8;
(82)5.42﹣3.87﹣1.13.
=5.42﹣5.
=0.42;
(83)4.38﹣1.56+0.62﹣0.44.
=(4.38+0.62)﹣(1.56+0.44).
=5﹣2.
=3;
(84)46.7﹣15.03﹣4.97
=46.7﹣(15.03+4.97).
=46.7﹣20.
=26.7;
(85)4.52+0.61+1.39+6.48
=(4.52+6.48)+(0.61+1.39).
=11+2.
=13;
(86)4.27﹣(1.96﹣1.73)
=4.27﹣0.23.
=4.04;
(87)7.27﹣(1.98+0.27).
=7.27﹣0.27﹣1.98.
=7﹣1.98.
=5.02;
(88)13.7+8.65﹣9.628.
=22.35﹣9.628.
=12.722;
(89)12.8﹣(4.38+1.614)
=12.8﹣5.994
=6.806
(90)15.17﹣(3.6+4.9).
=15.17﹣8.5.
=6.67;
(91)35.6+(12.6﹣4.4).
=35.6+8.2.
=43.8;
(92)16.4+3.5+83.6+166.5
=(16.4+83.6)+(3.5+166.5)
=100+170
=270;
(93)4.65﹣2.55﹣1.45.
=4.65﹣(2.55+1.45).
=4.65﹣4.
=0.65;
(94)1.28+0.86+38.72.
=(1.28+38.72)+0.86.
=40+0