小數(shù)四則混合運算專項練習(xí)題(能簡便的要簡便)

1、小數(shù)混合運算專項練習(xí)276題（能簡便的要簡便運算）(1)0.11 X 1.8+8.2 X 0.11(13)1.25 X 2.4(2)2.34 X 99+2.34(14)5.85 -( 1.3+0.5 )X 6.(3)5.4 - 2.7 X 0.8(15)17.17 - 6.8 - 3.2 - 6.17(4)132X 101(16)5.4 X (1.3+2.15 )- 0.2(5)6.25 - 1.25 - 0.8(17)8.4 - 0.6+8.4 - 0.4(6)2.5 X 16.(18)16.8 X 10.1(7)6.33 X 101 - 6.33(19)10.9 - 0.9 - 0.2+1

2、.8(8)1.56 X 1.7+0.44 X 1.7(20)1.25 X 3.2 X 0.25 .(9)1.8 X ( 3.41 - 2.9 )- 0.03(21)1.36+4.85+2.64+6.15(10)0.125 X 32X 2.5 .(22)98.5 - 2.5 - 4(11)1.258 X 18.5 - 0.258 X 18.5(23)5.4 - 2.5 X( 3.7 - 2.9 )(12)8.48 - 0.8 X 0.9(24)0.8 X( 4 - 3.68 )- 0.01(25)(26)(27)(28)(29)(30)(31)(32)(33)(34)(35)(36)(37)83

3、.7 - 12.83 - 0.17(38)25.46 - 8.23 - 1.765.96+13 X( 3.2 - 3.12 )(39)2.9+7.1 X 104.32 - 2.4 X 1.7 ;(40)1.25 X 32 X 0.25.16.2 X 4.5+3.8 X 4.5 ;(41)15.68-( 7.78 - 4.32)- 2.329.05 - 3.86 - 3.14 ;(42)0.25 X 3.2X 1.257.28+0.72 - 0.9(43)9.99 X 1.014.32+5.43+6.68(44)4.63 X 1.4+46.3 X 0.8617.17 - 6.8- 3.2(45)

4、17.5 - 0.8- 12.55.29X 9+5.29(46)0.9+9.9+99.9+999.9 .16.8X 10.1(47)2.9X 99+2.92.74X 9.5+5 X 0.274(48)25X 11.2X 40.36+9.6 - 3.2.(49)23.25- 6.75 - 3.25.3.75X 25+6.25 X 25(50)125X 3.2X 2.5(51)(52)(53)(54)(55)(56)(57)(58)(59)(60)(61)(62)(63)3.6X 10.1(64)0.125X 32 X 2.55.8X 2.7+0.58 X 73(65)0.8X 6.3 - 0.8

5、X 3.83.6+6.4 X 1.8(66)504- 3.2X 2.08(1.48+3.02)-( 3.6X 0.5)(67)(20 - 0.8 X 9)X 5.7(36.7 - 4.9)X 101 - 31.8.(68)2.4X 1.5+3.6 - 1.56.33X 101 - 6.33(69)7.38 - 5.14+3.62 - 2.8635.6 - 5 X 1.73(70)0.12 X 1.8+8.2 X 0.121.6X 55.4 - 55.4 X 0.6(71)5.4-0.51 -( 1.2 - 1.03)17.68 - 5.2+2.7 X 1.5 .(72)(8.1 - 5.6)X

6、 0.9 - 1.05 - 0.041.08 X 0.8 - 0.27(73)10.8 - 0.8-( 0.35+0.05)102X 0.45(74)8X 1 -( 2.3 - 2.25)22.78 - 1.25 - 0.8(75)2.64 X 9.9+0.2640.34 X 101 - 0.34 .(76)4.52+0.61+1.39+6.484.27 -( 1.96 - 1.73 )(90)9.6-0.4 X 0.25(294.4 - 19.2 X 6)-( 6+8)(91)29.7 -( 5.85 - 0.65)12.5 X 0.76 X 0.4 X 8X 2.5 .(92)7.4 X

7、9.94.98+8.02 X 2.5(93)3.84 - 2.7X 0.6460.8 - 40.8-2.5(94)8.68 - 8.68- 0.56X 0.50.8X 69.6 X 12.5(95)4.7X 4.7+4.7+4.3 X 4.7.4.98X 99+4.9(96)2.72 - (8.2 - 6.5 )X 0.5;6.48-3.2 - 2.5(97)9.12+9.12 X 9 - 60.2 ;1.2X 7.6+7.6 X 6.8 .(98)28.4 - 0.4 - 0.25 ;(9.4 - 5.8)X 2.07(99)27.36 - 27.36 - 7.6 .12.54 - 4.56

8、 - 3.44 - 1.54(100)3.25 X 0.45+6.75 X 0.45(9.36 X 5+9.36+9.36 X 2) X 1.25(101)31.5 - 24.5 - 3.57.236 - 0.18 - 14.3 X 0.02 .(102)7.5X 102(77)(78)(79)(80)(81)(82)(83)(84)(85)(86)(87)(88)(89)(103)6.3+3.7 X 2.8.(116)52.4 -( 15+0.6) - 1.6(104)2.15+8.73+1.27+7.85(117)9.87 X 99+9.87(105)11.87-( 8.2+1.87)(1

9、18)46.8 - 0.9-0.4(106)5.42 - 3.87 - 1.13(119)5.5X 17.3+6.7 X 5.5.(107)4.38 - 1.56+0.62 - 0.44(120)99 X 4.2+4.2(108)0.4X 270X 2.(121)0.25 X 1.25 X 3.2(109)(40+1.25 ) X 8(122)6.4 X 14+15 X 6.4+6.4(110)(12.5 - 0.05)X 8(123)(1.3+1.3X 0.125X 8)-( 80 - 77.4)(111)2.6X 8.5+8.5 X 7.4(124)4X( 25+2.5+0.25) - 1

10、11(112)9.9X 6.9 - 6.9X 3.9(125)6.25-( 17.2 - 3.6X 4.5)- 0.32(113)5.6X 99+5.6(126)28.4 X 99+28.4(114)2.5X( 1.9+1.9+1.9+1.9)(127)0.94 X 2.5 - 0.45(115)7.2- 1.25 - 8.(128)4X 0.8X 12.5X 2.517.5-0.25X 17+13 .(142) 2.4 X 1.5+3.6 -1.510.1X 872.3+3.19 -( 22 - 19.8)1.25 X 7.2.9.1 - 1.2-6 - 6.247.3+12.8 - 3.8

11、X 2.3(5.36+7.64) - 13X 100(143) 0.32 X 0.25+0.08 - 4(144)( 9.6+1.48 - 3.7 )- 8(145) 5.8 - 4 X( 1.34 - 0.14 )(146) 5.4 - 0.51 -( 1.2 - 1.03 ).(147)21.35 - 3.25 - 16.75(148)33.02 -( 148.4 - 90.85 )- 2.5(129)(130)(131)(132)(133)(134)(135)(136)(137)(138)(139)(140)(141)(149)32 X 2.5 X 0.1257.575 - ( 5.63

12、 - 1.88)X 0.2.7.5-( 5.5+1.24)(150)18.1+ (3 - 0.299 - 0.23 )X 1 .0.26+15.68+9.74+2.32(151)67-( 2.98+0.67 )13.26+9.55 - 3.26(152)8X 16 - 73.8 X 66.1+3.9 - 6.1+3.9.(153)(45+14)- 73+710.31.7 - 0.63 (保留2位小數(shù))(154)13.7 X 0.125 X 8(155)0.8 X 13 -( 3.12+5.28 )(168)18-0.3 X( 8- 6.5 )(156)102 X 0.56(169)12.7+1

13、2.5+0.5 .(157)1.53 X 1.7+0.47 X 1.7 .(170)91 - 2.6 - 0.05=(158)5.18+0.73+0.82(171)6.3 X 3.7+6.3 X 6.3=(159)0.75 X 1.8 - 1.5(172)(3.7+1.7 X 0.4 )- 2.5=(160)12.5 X 7.1 X 0.8(173)7.28+3.2 - 2.5=(161)6.12 X 99+6.12(174)0.74+0.9 X 7.4=(162)8.6 - 0.86+8 X 0.35(175)7.8 - 0.125 - 0.8=(163)5.6 X( 18.5 - 8.5

14、- 0.5 )(176)37.5 - 0.3 X( 1.34 - 0.84 )(164)0.125 X 4.78 X 80(177)(2.5+27.75 - 1.5 ) X 1.6 .(165)2.8 X 3.6+1.4 X 2.8(178)6.21 - 3.8+2.2(166)(0.4+40 ) X 2.5(179)6.03+3.7+2.97(167)78.7 - 17.7 X 3.6(180)17.43 - 6.57 - 2.43(181)20.47-( 1.47+6.8)(193)7.75 X 20-( 3.24 - 3.04)(182)13.26+4.71+3.47+5.29(194)

15、1.25X 0.5X 8X 0.2(183)22.74+8.68 - 13.74.(195)0.97 X 9+0.97(184)10- 0.2 - 2.5(196)5.4- 3 X( 3.8 - 2.9).(185)64X 4.5+3.6 X 45(197)0.4 X( 3.2 - 0.8 )- 0.15(186)1.25 X 3.2 X 0.8(198)5.7+1.9 X 0.2 - 7.6(187)14.5X 102(199)32.4 X 6.3+32.4 X 3.7(188)14.64+3.7 X 2.8(200)18.2 - 10.6 X( 0.9 - 0.75 )(189)8.4 0

16、.21 0.5.(201)0.25 X 3.85 X 40(202)1.46 X 3.5+3.5 X 4.54 .(190)0.125X 9X 8X 0.3(203)7X 12.5X 0.8(191)4.62-5 - 0.66(204)4.7X 3.6+4.7 X 6.4(192)5.78X 2.3+5.78+5.78 X 6.7(205)1.45 X (2.8+4.4 ) - 2.4.(206)4.2 X( 6.18 - 3.03 ) +6.3(219)0.6+0.94 - 0.208(207)15.02 - 6.8 -( 1.02+1.2)(220)4.85 X 1.25 X 8(208)

17、0.6 X ( 5- 0.68 )- 1.2(221)(64 - 22.4 - 1.4)X 1.2(209)2.7 - 4+6.3 X 0.25(222)18.3 - 6.25 - 3.75(210)(6.02+2.8)- 0.4 - 2.05(223)2.8X 3.6+1.4 X 2.8(211)3.08 X 3.5+6.2 X 3.08+3.08 X 0.3 .(224)6.6十14.5 -( 1.7+1.8)(212)2.3+3.91 -( 22 - 19.7)(225)0.25 X 9.87 X 4(213)21.6-64.8 -( 48.6 - 2.7X 2).(226)36.7 X

18、 2.1 + 10.8(214)93.6 X 3.6+1.4 X 3.6(227)8.45 - 0.45 X 0.1(215)0.25 X 0.8 X 0.125 X 0.4(228)0.73 X 102(216)2.7 X 1.5 - 2.7(229)7.8 X 5.6+2.3 X 4.4(217)9.08+5.45+11.92+4.55(230)76.3 X 27 - 76.3 X 17.(218)1.25 X 30 X 1.2 X 0.8 .(231)7.05 X 23.7+7.05 X 76.3 .(232)(7.6 - 5.2 )- 0.4+2.54 X 32.(245)2.5 -(

19、 6.8- 4.9) X 0.8.(233)17.68 - 5.2+2.7 X 1.5(246)102X 4.5(234)35.6 - 5 X 1.73(247)3.4- (1.2+0.5)X 5(235)(1.1 - 0.78)X( 2.7 - 1.95)(248)8X( 20- 1.25)(236)1.3 X 0.75 X 4(249)0.654+10.9 X 6.5(237)1.08 - 1.8 X 1.2(250)22.7 X 1.25 X 0.8(238)50.4 X 1.9 - 1.8(251)3.91 X 2.8+6.09 X 2.8 .(239)0.82 X 0.25+1.18 X 0.25 .(252)6.23+3.09=(240)8.5X (2.36+2.42)- 0.25(253)132.4 - 59.8=(241)3.9- (1.3+0.6 )X 6 - 3.6(254)6.62