小数四则混合运算专项练习276题(共31页).doc

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1、精选优质文档-倾情为你奉上 小数混合运算专项练习276题(有答案)专心-专注-专业(1) 0.111.8+8.20.11(2) 2.3499+2.34(3) 5.42.70.8(4) 132101(5) 6.251.250.8(6) 2.516(7) 6.331016.33 (8) 1.561.7+0.441.7(9) 1.8(3.412.9)0.03(10) 0.125322.5(11) 1.25818.50.25818.5(12) 8.480.80.9(13) 1.252.4(14) 5.85(1.3+0.5)6(15) 17.176.83.26.17(16) 5.4(1.3+2.15)0

2、.2(17) 8.40.6+8.40.4(18) 16.810.1(19) 10.90.90.2+1.8(20) 1.253.20.25(21) 1.36+4.85+2.64+6.15 (22) 98.52.54 (23) 5.42.5(3.72.9)(24) 0.8(43.68)0.01 (25) 83.712.830.17 (26) 5.96+13(3.23.12)(27) 4.322.41.7;(28) 16.24.5+3.84.5;(29) 9.053.863.14;(30) 7.28+0.720.9(31) 4.32+5.43+6.68(32) 17.176.83.2(33) 5.2

3、99+5.29(34) 16.810.1(35) 2.749.5+50.274(36) 0.36+9.63.2(37) 3.7525+6.2525(38) 25.468.231.76(39) 2.9+7.110(40) 1.25320.25(41) 15.68(7.784.32)2.32(42) 0.253.21.25(43) 9.991.01(44) 4.631.4+46.30.86(45) 17.50.812.5(46) 0.9+9.9+99.9+999.9(47) 2.999+2.9(48) 2511.24(49) 23.256.753.25(50) 1253.22.5(51) 3.61

4、0.1(52) 5.82.7+0.5873(53) 3.6+6.41.8(54) (1.48+3.02)(3.60.5)(55) (36.74.9)10131.8(56) 6.331016.33(57) 35.651.73(58) 1.655.455.40.6(59) 17.685.2+2.71.5(60) 1.080.80.27(61) 1020.45(62) 22.781.250.8(63) 0.341010.34(64) 0.125322.5(65) 0.86.30.83.8(66) 5043.22.08(67) (200.89)5.7(68) 2.41.5+3.61.5(69) 7.3

5、85.14+3.622.86(70) 0.121.8+8.20.12(71) 5.40.51(1.21.03)(72) (8.15.6)0.91.050.04(73) 10.80.8(0.35+0.05)(74) 81(2.32.25)(75) 2.649.9+0.264(76) 4.52+0.61+1.39+6.48 (77) 4.27(1.961.73)(78) (294.419.26)(6+8)(79) 12.50.760.482.5(80) 4.98+8.022.5(81) 60.840.82.5(82) 0.869.612.5(83) 4.9899+4.9(84) 6.483.22.

6、5(85) 1.27.6+7.66.8(86) (9.45.8)2.07(87) 12.544.563.441.54(88) (9.365+9.36+9.362)1.25(89) 7.2360.1814.30.02(90) 9.60.40.25(91) 29.7(5.850.65)(92) 7.49.9(93) 3.842.70.64(94) 8.688.680.560.5(95) 4.74.7+4.7+4.34.7(96) 2.72(8.26.5)0.5;(97) 9.12+9.12960.2;(98) 28.40.40.25;(99) 27.3627.367.6(100) 3.250.45

7、+6.750.45(101) 31.524.53.5(102) 7.5102(103) 6.3+3.72.8(104) 2.15+8.73+1.27+7.85(105) 11.87(8.2+1.87)(106) 5.423.871.13(107) 4.381.56+0.620.44(108) 0.42702(109) (40+1.25)8(110) (12.50.05)8 (111) 2.68.5+8.57.4(112) 9.96.96.93.9(113) 5.699+5.6 (114) 2.5(1.9+1.9+1.9+1.9)(115) 7.21.258(116) 52.4(15+0.6)1

8、.6(117) 9.8799+9.87(118) 46.80.90.4(119) 5.517.3+6.75.5(120) 994.2+4.2(121) 0.251.253.2(122) 6.414+156.4+6.4(123) (1.3+1.30.1258)(8077.4)(124) 4(25+2.5+0.25)111(125) 6.25(17.23.64.5)0.32(126) 28.499+28.4 (127) 0.942.50.45(128) 40.812.52.5(129) 17.50.2517+13(130) 10.187(131) 2.3+3.19(2219.8)(132) 1.2

9、57.2(133) 9.11.266.24(134) 7.3+12.83.82.3(135) (5.36+7.64)13100(136) 7.575(5.631.88)0.2(137) 7.5(5.5+1.24)(138) 0.26+15.68+9.74+2.32(139) 13.26+9.553.26(140) 6.1+3.96.1+3.9(141) 31.70.63(保留2位小数) (142) 2.41.5+3.61.5(143) 0.320.25+0.084 (144) (9.6+1.483.7)8(145) 5.84(1.340.14)(146) 5.40.51(1.21.03)(14

10、7) 21.353.2516.75 (148) 33.02(148.490.85)2.5(149) 322.50.125 (150) 18.1+(30.2990.23)1(151) 67(2.98+0.67)(152) 81673.86(153) (45+14)73+710(154) 13.70.1258(155) 0.813(3.12+5.28)(156) 1020.56(157) 1.531.7+0.471.7(158) 5.18+0.73+0.82(159) 0.751.81.5(160) 12.57.10.8(161) 6.1299+6.12(162) 8.60.86+80.35(16

11、3) 5.6(18.58.50.5)(164) 0.1254.7880(165) 2.83.6+1.42.8(166) (0.4+40)2.5(167) 78.717.73.6(168) 180.3(86.5)(169) 12.7+12.5+0.5(170) 912.60.05=(171) 6.33.7+6.36.3=(172) (3.7+1.70.4)2.5=(173) 7.28+3.22.5=(174) 0.74+0.97.4=(175) 7.80.1250.8=(176) 37.50.3(1.340.84)(177) (2.5+27.751.5)1.6(178) 6.213.8+2.2(

12、179) 6.03+3.7+2.97(180) 17.436.572.43(181) 20.47(1.47+6.8)(182) 13.26+4.71+3.47+5.29(183) 22.74+8.6813.74(184) 100.22.5(185) 644.5+3.645(186) 1.253.20.8(187) 14.5102(188) 14.64+3.72.8(189) 8.40.210.5(190) 0.125980.3(191) 4.6250.66(192) 5.782.3+5.78+5.786.7(193) 7.7520(3.243.04)(194) 1.250.580.2(195)

13、 0.979+0.97(196) 5.433.82.9(197) 0.4(3.20.8)0.15 (198) 5.7+1.90.27.6(199) 32.46.3+32.43.7 (200) 18.210.6(0.90.75)(201) 0.253.8540 (202) 1.463.5+3.54.54(203) 712.50.8(204) 4.73.6+4.76.4(205) 1.45(2.8+4.4)2.4(206) 4.2(6.183.03)+6.3 (207) 15.026.8(1.02+1.2 ) (208) 0.6(50.68)1.2(209) 2.74+6.30.25(210) (

14、6.02+2.8 )0.42.05 (211) 3.083.5+6.23.08+3.080.3(212) 2.3+3.91(2219.7)(213) 21.664.8(48.62.72)(214) 93.63.6+1.43.6 (215) 0.250.80.1250.4 (216) 2.71.52.7(217) 9.08+5.45+11.92+4.55 (218) 1.25301.20.8(219) 0.6+0.940.208(220) 4.851.258(221) (6422.41.4)1.2(222) 18.36.253.75(223) 2.83.6+1.42.8(224) 6.614.5

15、(1.7+1.8)(225) 0.259.874 (226) 36.72.1+10.8 (227) 8.450.450.1(228) 0.73102 (229) 7.85.6+2.34.4 (230) 76.32776.317(231) 7.0523.7+7.0576.3(232) (7.65.2)0.4+2.5432(233) 17.685.2+2.71.5(234) 35.651.73(235) (1.10.78)(2.71.95)(236) 1.30.754(237) 1.081.81.2(238) 50.41.91.8(239) 0.820.25+1.180.25(240) 8.5(2

16、.36+2.42)0.25(241) 3.9(1.3+0.6)63.6(242) 4.256.3+3.74.25(243) 2050.99(244) 25.67.492.51(245) 2.5(6.84.9)0.8 (246) 1024.5(247) 3.4(1.2+0.5)5(248) 8(201.25)(249) 0.654+10.96.5(250) 22.71.250.8(251) 3.912.8+6.092.8(252) 6.23+3.09=(253) 132.459.8=(254) 6.620.84=(255) 2.070.023=(256) 20.026(8.6+9.7)0.923

17、0.19(257) 0.125322.5(258) 0.86.30.83.8 (259) 50.43.22.08(260) 204(3.40.5)(261) (43.26+2.34)7.5(262) (200.89)5.7(263) 13.250.8+1.751.2; (264) 2.599+2.5;(265) 10.36+4.816.55; (266) 12.52.4(267) 38.7819.59+41.2230.41 (268) 2.744.86+4.866.26+4.86(269) 0.08(12.5+2.5)0.1 (270) 25.92+(10.114.50.2)(271) 0.4

18、8712.548.7 (272) (8.16+2.09)(10.39.3)0.4(273) 1.561.7+0.441.7(274) 12.5(7.21.9)0.8(275) 0.252010+20.1075(276) 30.8(6.344.59)4参考答案:(1)0.111.8+8.20.11,=0.11(1.8+8.2),=0.1110,=1.1;(2)2.3499+2.34,=2.34(99+1),=2.34100,=234;(3)5.42.70.8,=20.8,=1.6;(4)132101,=132(100+1),=132100+132,=13332;(5)6.251.250.8,=6

19、.25(1.250.8),=6.251,=6.25;(6)2.516,=(2.54)4,=40(7)6.331016.33,=6.33(1011),=6.33100,=633;(8)1.561.7+0.441.7,=1.7(1.56+0.44),=1.72,=3.4;(9)1.8(3.412.9)0.03,=1.80.510.03,=1.817,=30.6;(10)0.125322.5,=(0.1258)(42.5),=110,=10(11)1.25818.50.25818.5,=18.5(1.2580.258),=18.51,=18.5;(12)8.480.80.9,=10.60.9,=9.

20、54;(13)1.252.4,=1.2580.3,=100.3,=3;(14)5.85(1.3+0.5)6,=5.851.86,=3.256,=19.5(15)17.176.83.26.17=(17.176.17)(6.8+3.2),=1110,=1;(16)5.4(1.3+2.15)0.2=5.43.450.2,=5.417.25,=93.15;(17)8.40.6+8.40.4=14+21=35;(18)16.810.1=16.810+16.80.1,=168+1.68,=169.68;(19)10.90.90.2+1.8=10.94.5+1.8,=8.2;(20)1.253.20.25=

21、(1.250.8)(40.25),=11,=1(21)1.36+4.85+2.64+6.15,=(1.36+2.64)+(4.85+6.15),=4+11,=15;(22)98.52.54,=98.5(2.54),=98.510,=9.85;(23)5.42.5(3.72.9),=5.42.50.8,=5.42,=2.7;(24)0.8(43.68)0.01,=0.80.320.01,=0.2560.01,=25.6;(25)83.712.830.17,=83.7(12.83+0.17),=83.713,=70.7;(26)5.96+13(3.23.12),=5.96+130.08,=5.96

22、+1.04,=7(27)4.322.41.7,=1.81.7,=3.06;(28)16.24.5+3.84.5,=(16.2+3.8)4.5,=204.5,=90;(29)9.053.863.14,=9.05(3.86+3.14),=9.057,=2.05;(30)7.28+0.720.9,=7.28+0.8,=8.08(31)4.32+5.43+6.68,=4.32+6.68+5.43,=11+5.43,=16.43;(32)17.176.83.2,=17.17(6.8+3.2),=17.1710,=7.17;(33)5.299+5.29,=5.29(9+1),=5.2910,=52.9;(

23、34)16.810.1,=16.810+16.80.1,=168+1.68,=169.68;(35)2.749.5+50.274,=2.749.5+0.52.74,=2.74(9.5+0.5),=2.7410,=27.4;(36)0.36+9.63.2,=0.36+3,=3.36(37)3.7525+6.2525,=25(3.75+6.25),=2510,=250;(38)25.468.231.76,=25.46(8.23+1.76),=25.469.99=15.45;(39)2.9+7.110,=2.9+71,=73.9;(40)1.25320.25=(1.258)(40.25),=101,

24、=1(41)15.68(7.784.32)2.32,=15.687.78+4.322.32,=(15.68+4.32)(7.78+2.32),=2010,=10;(42)0.253.21.25,=0.2540.81.25,=(0.254)(0.81.25),=11,=1;(43)9.991.01,=(100.01)1.01,=10.10.0101,=10.0899;(44)4.631.4+46.30.86,=46.30.14+46.30.86,=46.3(0.14+0.86),=46.31,=46.3;(45)17.50.812.5,=17.5(0.812.5),=17.51,=17.5;(4

25、6)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(47)2.999+2.9=(99+1)2.9,=1002.9,=290;(48)2511.24=25411.2,=10011.2,=1120;(49)23.256.753.25=23.25(6.75+3.25),=23.2510,=13.25(50)1253.22.5,=12580.42.5,=(1258)(0.42.5),=10001,=1000;(51)3.610.1,=3.6(10+0.1),

26、=3.610+3.60.1,=36+0.36,=36.36;(52)5.82.7+0.5873,=5.82.7+5.87.3,=5.8(2.7+7.3),=5.810,=58;(53)3.6+6.41.8,=3.6+11.52,=15.12;(54)(1.48+3.02)(3.60.5),=4.51.8,=2.5;(55)(36.74.9)10131.8,=31.810131.8,=31.8(1011),=31.8100,=3180(56)6.331016.33=6.33(1011),=6.33100,=633;(57)35.651.73,=35.68.65,=26.95;(58)1.655.

27、455.40.6,=55.4(1.60.6),=55.41,=55.4;(59)17.685.2+2.71.5,=3.4+4.05,=7.45(60)1.080.80.27=1.080.270.8,=40.8,=3.2;(61)1020.45=(100+2)0.45,=1000.45+20.45,=45+0.9,=45.9;(62)22.781.250.8=22.78(1.250.8),=22.781,=22.78;(63)0.341010.34=(1011)0.34,=1000.34,=34(64)0.125322.5,=(0.1258)(42.5),=110,=10;(65)0.86.30

28、.83.8,=0.8(6.33.8),=0.82.5,=2;(66)5043.22.08,=157.52.08,=327.6;(67)(200.89)5.7,=(207.2)5.7,=12.85.7,=72.96(68)2.41.5+3.61.5,=3.6+2.4,=6;(69)7.385.14+3.622.86,=(7.38+3.62)(5.14+2.86),=118,=3;(70)0.121.8+8.20.12,=0.12(1.8+8.2),=0.1210,=1.2;(71)5.40.51(1.21.03),=5.40.510.17,=5.43,=1.8;(72)(8.15.6)0.91.

29、050.04,=2.50.91.050.04,=2.251.050.04,=1.20.04,=30(73)10.80.8(0.35+0.05),=10.80.80.4,=10.82,=8.8;(74)81(2.32.25),=810.05,=820,=160;(75)2.649.9+0.264,=0.26499+0.264,=0.264(99+1),=0.264100,=26.4;(76)4.52+0.61+1.39+6.48=(4.52+6.48)+(0.61+1.39),=11+2,=13;(77)4.27(1.961.73)=4.270.23,=4.04;(78)(294.419.26)

30、(6+8)=(294.4115.2)14,=179.214,=12.8;(79)12.50.760.482.5=(12.58)(0.42.5)0.76,=10010.76,=76(80)4.98+8.022.5,=4.98+20.25,=25.03;(81)60.840.82.5,=60.816.32,=44.48;(82)0.869.612.5,=(0.812.5)69.6,=1069.6,=696;(83)4.9899+4.9,=493.02+4.9,=497.92;(84)6.483.22.5,=6.48(3.22.5),=6.488,=0.81;(85)1.27.6+7.66.8,=7

31、.6(1.2+6.8),=7.68,=60.8(86)(9.45.8)2.07,=3.62.07,=7.452;(87)12.544.563.441.54,=(12.541.54)(4.56+3.44),=118,=3;(88)(9.365+9.36+9.362)1.25,=9.36(5+2+1)1.25,=9.3681.25,=9.36(81.25),=93.6;(89)7.2360.1814.30.02,=40.20.286,=39.914(90)9.60.40.25,=240.25,=6; (91)29.7(5.850.65),=29.79,=3.3;(92)7.49.9,=7.4(10

32、0.1),=7.4107.40.1,=740.74,=73.26;(93)3.842.70.64,=3.841.728,=2.112; (94)8.688.680.560.5,=8.6815.50.5,=8.687.75,=0.93;(95)4.74.7+4.7+4.34.7,=4.7(4.7+4.3+1),=4.710,=47(96)2.72(8.26.5)0.5=2.721.70.5,=2.720.85,=3.2;(97)9.12+9.12960.2=(1+9)9.1260.2,=109.1260.2,=91.260.2,=31;(98)28.40.40.25=28.4(0.40.25),

33、=28.40.1,=284;(99)27.3627.367.6=27.63.6,=24(100)3.250.45+6.750.45,=0.45(3.25+6.75),=0.4510,=4.5;(101)31.524.53.5,=31.57,=24.5;(102)7.5102,=7.5(100+2),=7.5100+7.52,=750+15,=765;(103)6.3+3.72.8,=6.3+10.36,=16.66(104)2.15+8.73+1.27+7.85=(2.15+7.85)+(8.73+1.27),=10+10,=20;(105)11.87(8.2+1.87),=11.871.87

34、8.2,=108.2,=1.8;(106)5.423.871.13,=5.425,=0.42;(107)4.381.56+0.620.44,=(4.38+0.62)(1.56+0.44),=52,=3;(108)0.42702.5,=(0.42.5)270,=270;(109)(40+1.25)8,=408+1.258,=320+10,=330;(110)(12.50.05)8,=12.580.058,=1000.4,=99.6;(111)2.68.5+8.57.4,=(2.6+7.4)8.5,=85;(112)9.96.96.93.9,=(9.93.9)6.9,=66.9,=41.4;(11

35、3)5.699+5.6,=5.6(99+1),=560;(114)2.5(1.9+1.9+1.9+1.9),=2.541.9,=101.9,=19;(115)7.21.258,=7.281.25,=0.91.25,=0.72(116)52.4(15+0.6)1.6,=52.415.61.6,=52.49.75,=42.65;(117)9.8799+9.87,=9.87(99+1),=987;(118)46.80.90.4,=46.8(0.90.4),=46.80.36,=130;(119)5.517.3+6.75.5,=5.5(17.3+6.7),=5.524,=132(120)994.2+4

36、.2=4.2(99+1),=4.2100,=420; (121)0.251.253.2=0.251.25(40.8),=0.254(1.250.8),=11,=1;(122)6.414+156.4+6.4=6.4(14+15+1),=6.430,=192;(123)(1.3+1.30.1258)(8077.4)=(1.3+1.31)2.6,=2.62.6,=1;(124)4(25+2.5+0.25)111=(425+42.5+40.25)111,=(100+10+1)111,=111111,=1;(125)6.25(17.23.64.5)0.32=6.25(17.216.2)0.32,=6.2

37、5(10.32),=6.253.125,=2(126)28.499+28.4,=28.4(99+1),=28.4100,=2840(127)0.942.50.45,=2.350.45,=1.9 (128)40.812.52.5,=(42.5)(0.812.5),=1010,=100 (129)17.50.2517+13,=7017+13,=1190+13,=1203(130)10.187,=(10+0.1)87,=87+8.7,=95.7;(131)2.3+3.19(2219.8),=2.3+3.192.2,=2.3+1.45,=3.75;(132)1.257.2,=1.2580.9,=100

38、.9,=9(133)9.11.266.24=9.10.26.24,=8.96.24,=2.66;(134)7.3+12.83.82.3=20.18.74,=11.36;(135)(5.36+7.64)13100=1313100,=100;(136)7.575(5.631.88)0.2=7.5753.750.2,=7.5750.75,=10.1(137)7.5(5.5+1.24),=7.55.51.24,=21.24,=0.76;(138)0.26+15.68+9.74+2.32,=(0.26+9.74)+(15.68+2.32),=10+18,=28;(139)13.26+9.553.26,=13.263.26+9.55,=10+9.55,=19.55;(140)6.1+3.96.1+3.9,=6.16.1+(3.9+3.9),=0+7.8,=7.8(141)31.70.6350.32;(142)2.41.5+3.61.5=3.6+2.4,=6;(143)0.320.25+0.084 =0.08+0.084,

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