小数加减法专项练习(200题)含答案
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1、 小数加减法-1 小数加减法专项练习 200 题(有答案)(1)7.4+12.86(2)205.674(3)141.248.98(4)102+4.36(5)32.1527.45(6)12.9+5.01(7)29.46(9.46+3.8)(8)15.75+0.652.75+3.35(9)65.714.99(10)12.42+0.48(11)0.56+11.534(12)4422.13(13)9122.035(14)52.6+21.237(15)9.152.18(16)3.851.5+1.32,(17)15.4+6.87(18)3.56+27.84 小数加减法-2(19)10082.13=17.8
2、7(20)123.5647.9+51.7(21)2.7+3.1+2.9+3.2,(22)28.42+19.48(23)42.56+3.124(24)8130.75(25)15.6 十 0.237(26)148.225.6224.38(27)4.520.740.26(28)0.42+5.4+1.58+2.6(29)5.9+28.6516.57(30)57.53.2516.75,(31)6.02+3.6+1.98(32)1.29+3.7+2.71+6.3(33)3.070.381.62(34)3.25+1.790.59+1.75(35)7.5+4.96.1(36)14.8+7.94.8(37)2.
3、608+2.84(38)6.073.869 小数加减法-3(39)1.50.306(40)76.8+26.82(41)102.0737.257(42)48.64+18.6(43)54.755.2514.75,(44)4.68+14.79+5.3210.79,(45)48.912.70.3,(46)56.439.7+24.3,(47)3.62.8+3.47.2,(48)3.67+18.5+6.33,(49)12017.832.17,(50)17.176.83.26.17(51)73.81.6413.85.36(52)6.75(0.9+3.75)(53)27.385.34+2.624.66 (54
4、)35.724.9(5.72+5.1)(55)0.730.250.73+0.25 (56)5.3+0.1+5.30.1 (57)12.74.85.2(58)23.256.753.25 小数加减法-4(59)4.58+2.39+(5.42+7.61)(60)9.053.863.14(61)209.180.82(62)6.53(1.53+2.6)(63)5.521.0740.926(64)4.21+1.04+0.79(65)1.36+4.85+2.64+6.15(66)83.712.830.17(67)4.32+5.43+6.68(68)17.176.83.2,(69)1+12.7+5.9+17.
5、3(70)27042.517.5(71)15.68(7.784.32)2.32,(72)0.9+9.9+99.9+999.9,(73)25.468.231.76,(74)9.4+0.36.4,(75)15.25+4.72+4.75+5.28,(76)34.823(4.82+15.2),(77)12.74.85.2,(78)3.1+25.78+6.9,小数加减法-5(79)73.81.6413.85.36,(80)2.15+8.73+1.27+7.85(81)11.87(8.2+1.87),(82)5.423.871.13,(83)4.381.56+0.620.44,(84)46.715.034
6、.97(85)4.52+0.61+1.39+6.48(86)4.27(1.961.73)(87)7.27(1.98+0.27),(88)13.7+8.659.628,(89)12.8(4.38+1.614)(90)15.17(3.6+4.9),(91)35.6+(12.64.4),(92)16.4+3.5+83.6+166.5(93)4.652.551.45,(94)1.28+0.86+38.72,(95)25.743.576.43,(96)14.54.685.32,(97)0.485+0.64+3.36,(98)72.519.3412.66,小数加减法-6(99)14.024.5+0.98,
7、(100)5.76+2.43+0.24+10.57,(101)9.28(3.28+2.55),(102)9.5+4.856.13,(103)10.751.862.753.16,(104)1.3+0.94+0.06+7.7,(105)4.45+0.63+5.55,(106)45.5(0.98+5.5),(107)0.960.28+0.040.72,(108)12.7+12.5+0.5,(109)0.6+0.940.208,(110)27.73(4.731.85),(111)3.84+26.5(208.6),(112)7.385.14+3.622.86,(113)5.86+13.089.27,(1
8、14)25.4(15.46.4),(115)47.237.235.89,(116)4.45+0.63+5.55,(117)5.28(2.9+1.28),(118)5.25+7.862.86+4.75,小数加减法-7(119)0.960.28+0.040.72,(120)9.42+7.39+1.58,(121)18.41.65.4,(122)75.7+39.423.86,(123)21.21+38.389.79,(124)47.28+1.39+52.72,(125)2.451.68+1.54,(126)158.131.87,(127)5.14+3.2256.302,(128)3.95+5.361
9、.95,(129)13.67(5.45+3.67),(130)4.26+5.481.26+4.52,(131)14.67+25.91+15.33+4.09,(132)10.75(2.40.86),(133)9.614.38+0.35,(134)3.87+4.92+1.13,(135)46.248.661.34,(136)21.99.220.78+8.1,(137)35.47+39.8812.37,(138)93.215.9914.01,小数加减法-8(139)15.37+28.94+4.63+1.06,(140)42.37(12.379.78),(141)38.7819.59+41.2230.
10、41,(142)1.9+19.9+199.9+0.3(143)429+31.1+2.04,(144)10027.242.8,(145)9(3.02+1.25),(146)1.81.57+0.2,(147)5.032.5+0.96,(148)35.72(5.9+5.72),(149)254.7+5.3,(150)1.3+2.83+8.7+0.17,(151)2.472.23.8+7.53,(152)6.89+4.7+2.11+5.3,(153)7.462.371.63,(154)14(3.65+0.24),(155)70.81.251.75,(156)5.81+8.3+4.19+11.7,(15
11、7)4.2+7.64+5.8+2.36,(158)14.282.637.37,小数加减法-9(159)6.8+5.26+3.74+3.2,(160)6.213.8+2.2,(161)6.03+3.7+2.97,(162)17.436.572.43,(163)20.47(1.47+6.8),(164)13.26+4.71+3.47+5.29,(165)22.74+8.6813.74,(166)12.566.643.36,(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,(
12、171)53.7813.637.4+6.22,(172)60(21.58.8)+7.3,(173)9.5+4.856.13,(174)75.8(15.34.8),(175)51.278.661.34,(176)28.43.961.04+4.6,(177)70.87.251.75(178)5.81+8.3+4.19+11.7 小数加减法-10(179)794198,(180)6756193207,(181)0.9+1.08+0.92+0.1,(182)13.596.910.09,(183)4.58+3.38+(5.48+6.62)(184)73.75(4.3+8.75)(185)5(4.192.
13、83),(186)1.39+0.72+0.61+3.28,(187)83.76.3,(188)8.28(1.28+3.7),(189)15.377.59+5.7312.41,(190)11.727.85(1.26+0.46),(191)15.37+28.44+12.56,(192)12.64(3.96+4.64),(193)36.264.78+3.74,(194)7.34+7.57+12.66+6.43,(195)78.6523.1214.88,(195)4.58+2.39+(5.42+7.61),(196)8.27+5.84+1.73+2.16,(197)18.519.080.92,小数加减
14、法-11(198)0.09+0.6+5.91+3.4,(199)7.85+6.76+2.15(200)18.433.767.24(201)21.65+(4.83.65)(202)9.64(4.641.23)(203)2.7+17.6+3.35.6(204)9.873.5+2.138.5(205)5.64+4.97+0.03,(206)10.933.744.26,(207)106.83.2,(208)5.81+8.3+4.19+11.7,(209)3.781.46+1.54,(210)8.45(5.45+2.98);,(211)3.01+8.2+6.99+1.8,(212)4.3(5.985.7
15、),(213)5.520.550.45,(214)19.626.72+80.43.28,(215)27.510.80.2,(216)43.5+1813.5,(217)63.5(43.5+20),小数加减法-12(218)75.3624.9+24.6425.1,(219)12.566.643.36,(220)45.5(0.98+5.5),(221)6+7.94+6.4,(222)5.41+3.462.46,(223)2.030.182.82+7.97,(224)104.445.56,(225)32.63+7.896.4,(226)3.97+0.71.32,(227)30(3.8+0.75),(2
16、28)75.6(14.38.3),小数加减法-13 参考答案参考答案:(1)7.4+12.86=20.26;(2)205.674=14.326;(3)141.248.98=92.22;(4)102+4.36=106.36;(5)32.1527.45=4.7;验算:(6)12.9+5.01=17.91;验算:(7)29.46(9.46+3.8),=29.469.463.8,=203.8,=16.2;(8)15.75+0.652.75+3.35,=(15.752.75)+(0.65+3.35),=13+4,=17;(9)65.714.99,=65.71(50.01),=65.715+0.01,=6
17、0.71+0.01,=60.72;(10)12.42+0.48=12.9,(11)0.56+11.534=12.094,(12)4422.13=21.87,(13)9122.035=68.965,(14)52.6+21.237=73.837,(15)9.152.18=6.97 (16)3.851.5+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)10082.13=17.87 验算:(20)123.5647.9+51.7=127.36 小数加减法-14 验算:(21)2.7+3.1+2.9+3.2,
18、=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)8130.75=50.25 验算:(25)15.6 十 0.237=15.837 验算:(26)148.225.6224.38=148.2(25.62+24.38),=148.250,=98.2(27)4.520.740.26=4.52(0.74+0.26)=4.521=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+28.6516.57=
19、17.98;(30)57.53.2516.75,=57.5(3.25+16.75),=57.520,=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)3.070.381.62=3.07(0.38+1.62),=3.072,=1.07;(34)3.25+1.790.59+1.75=(3.25+1.75)+(1.790.59),=5+1.2,=6.2;(35)7.5+4.96.1=12.46.1,=6.3;(36)14.8+7.94
20、.8=14.84.8+7.9,=10+7.9=17.9(37)2.608+2.84=5.448,小数加减法-15(38)6.073.869=2.201,(39)1.50.306=1.194,(40)76.8+26.82=103.62,(41)102.0737.257=64.813,(42)48.64+18.6=67.24 (43)54.755.2514.75,=54.75(14.75+5.25),=54.7520,=34.75;(44)4.68+14.79+5.3210.79,=(4.68+5.32)+(14.7910.79),=10+4,=14;(45)48.912.70.3,=48.9(1
21、2.7+0.3),=48.913,=35.9;(46)56.439.7+24.3,=16.7+24.3,=41;(47)3.62.8+3.47.2,=(3.6+13.4)(2.8+7.2),=1710,=7;(48)3.67+18.5+6.33,=(3.67+6.33)+18.5,=10+18.5,=28.5;(49)12017.832.17,=12017.832.17,=120(17.83+2.17),=12020,=100;(50)17.176.83.26.17=(17.176.17)(6.8+3.2),=1110,=1;(51)73.81.6413.85.36=73.813.8(1.64
22、+5.36),=607,=53;(52)6.75(0.9+3.75)=6.753.750.9,=30.9,=2.1;(53)27.385.34+2.624.66 =22.04+2.624.66,=24.664.66,=20;(54)35.724.9(5.72+5.1)=35.72(4.9+5.72+5.1),=35.7215.72,=20;(55)0.730.250.73+0.25 =0.750.750.25+0.25,=00.25+0.25,=00,=0;(56)5.3+0.1+5.30.1 =5.3+5.3+0.10.1,=10.6+0.10.1,=10.70.1,=10.6;(57)12
23、.74.85.2=12.7(4.8+5.2);=12.710,=2.7(58)23.256.753.25=23.25(6.75+3.25),=23.2510,=13.25(59)4.58+2.39+(5.42+7.61)=(4.58+5.42)+(2.39+7.61)=10+10,=20;(60)9.053.863.14,=9.05(3.86+3.14),=9.057,=2.05;(61)209.180.82,=20(9.18+0.82),=2010,=10 小数加减法-16(62)6.53(1.53+2.6),=6.531.532.6,=42.6,=1.4(63)5.521.0740.926
24、,=5.52(1.074+0.926),=5.522,=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)83.712.830.17,=83.7(12.83+0.17),=83.713,=70.7;(67)4.32+5.43+6.68,=4.32+6.68+5.43,=11+5.43,=16.43;(68)17.176.83.2,=17.17(6.8+3.2),=17.1710,=7.17;(69)1+12.7+5.
25、9+17.3=1+(12.7+17.3)+5.9,=1+30+5.9,=36.9;(70)27042.517.5=270(42.5+17.5),=27060,=210;(71)15.68(7.784.32)2.32,=15.687.78+4.322.32,=(15.68+4.32)(7.78+2.32),=2010,=10;(72)0.9+9.9+99.9+999.9,=10.1+100.1+1000.1+10000.1,=(1+10+100+1000)(0.1+0.1+0.1+0.1),=11110.4,=1110.6(73)25.468.231.76,=25.46(8.23+1.76),=
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