小數(shù)四則混合運(yùn)算專項(xiàng)練習(xí)題(能簡便的要簡便)

1、小數(shù)混合運(yùn)算專項(xiàng)練習(xí)276題（能簡便的要簡便運(yùn)算）(1)0.11 X 1.8+8.2 X 0.11(2)2.34 X 99+2.34(3)5.4+2.7 X 0.8(4)132X 101(14 )5.85 + ( 1.3+0.5 ) X 6.(15 )17.17 6.8 3.2 6.17(16 )5.4 X (1.3+2.15 ) + 0.2(17 )8.4 + 0.6+8.4 +0.4(13 )1.25X2.4(26 )5.96+13 X ( 3.2 - 3.12 )(18 )16.8 X 10.1(5)6.25 + 1.25 +0.8(6)2.5X16.(19 )10.9 -0.9 +0.

2、2+1.86.33X101 6.33(20 )1.25 X3.2 X 0.25 .(8) 1.56 X 1.7+0.44 X 1.7(21)1.36+4.85+2.64+6.15(22 )98.5 +2.5 +4(9) 1.8 X (3.41 2.9) + 0.03(10 )0.125 X 32X 2.5 .(23 )5.4 + 2.5 X ( 3.7 2.9 )(11)1.258 X 18.5 0.258 X 18.5(24 )0.8 X ( 4 3.68 ) + 0.01(12 )8.48+0.8X0.9(25 )83.7 12.83 0.174.32 +2.4 X 1.7 ;(40 )1

3、.25 X 32 X 0.25.(39 )2.9+7.1 X 10(52 )5.8X 2.7+0.58 X 7316.2 X4.5+3.8 X 4.5 ;(41)15.68- ( 7.78 4.32) - 2.329.05 3.86 3.14 ;(42 )0.25 X 3.2 X 1.257.28+0.72 +0.9(43 )9.99X1.014.32+5.43+6.68(44 )4.63X1.4+46.3X0.8617.17-6.8- 3.2(45 )17.5 + 0.8+ 12.55.29X 9+5.29(46 )0.9+9.9+99.9+999.9 .16.8X 10.1(47 )2.9

4、X 99+2.92.74X 9.5+5 X 0.274(48 )25X 11.2X40.36+9.6 + 3.2.(49 )23.25- 6.75- 3.25.3.75X25+6.25X 25(50)125X 3.2X 2.525.46- 8.23- 1.76(51)3.6X 10.1(27 )(28 )(29 )(30 )(31)(32 )(33 )(34 )(35 )(36 )(37 )(38 )3.6+6.4X 1.8(66 )504+ 3.2X 2.08(53 )(54 )(55 )(56 )(57 )(58 )(59 )(60 )(61)(62 )(63 )(64 )(1.48+3.

5、02) + ( 3.6X 0.5)(67 )(20 0.8X 9) X 5.7(36.7 4.9) X 101 31.8.(68 )2.4X 1.5+3.6+ 1.5(65 )6.33X 101 6.3335.6 5 X 1.731.6X 55.4-55.4X 0.617.68+5.2+2.7X 1.5.1.08 X 0.8 +0.27102 X 0.4522.78 + 1.25 +0.80.34 X 101 - 0.34 .0.125X 32X2.50.8X 6.3- 0.8X 3.8(69 )7.38-5.14+3.62 2.86(70 )0.12X1.8+8.2X0.12(71)5.4+

6、 0.51 + (1.2 1.03 )(72 ) (8.15.6) X 0.91.05+ 0.04.(73)10.8-0.8- ( 0.35+0.05)(74)8X 1 + ( 2.3-2.25)(75)2.64X9.9+0.264(76)4.52+0.61+1.39+6.48(77)4.27 ( 1.96 1.73 )(78 )(294.4 19.2 X 6) + ( 6+8 )12.5 X 0.76 X 0.4 X 8X 2.5 .(92)7.4X 9.94.98+8.02X2.5(93)3.84-2.7X 0.6460.8 40.8+2.5(94)8.68 8.68+0.56X 0.50

7、.8X 69.6 X 12.5(95)4.7X4.7+4.7+4.3X4.7.4.98X 99+4.9(96)2.72 + (8.2 6.5 ) X0.5;6.48+3.2 + 2.5(97)9.12+9.12 X 9-60.2 ;1.2X 7.6+7.6X6.8.(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- 3.44- 1.54(100) 3.25 X 0.45+6.75 X 0.45(79 )(80 )(81)(82 )(83 )(84 )(85 )(86 )(87 )(88 )(89 )(9

8、0 )(91)(101) 31.5 24.5+3.5(102) 7.5X1029.6+ 0.4 X 0.2529.7+ ( 5.85+0.65)(9.36X 5+9.36+9.36X2) X 1.257.236+0.18 14.3X0.02.(103) 6.3+3.7X2.8.(104) 2.15+8.73+1.27+7.85(105 )11.87- ( 8.2+1.87)(118 )46.8 + 0.9+0.4(106 )(107 )(108 )(109 )(110)(111)(112 )(113 )(114 )(115 )(116 )(117 )5.42- 3.87- 1.134.38 1

9、.56+0.62 0.44(120) 99X4.2+4.20.4X 270X2.(121) 0.25X1.25X 3.2(40+1.25) X8(122 ) 6.4 X 14+15 X 6.4+6.4(12.50.05) X 8(123) (1.3+1.3X 0.125X 8) + ( 80 77.4)2.6X 8.5+8.5X 7.4(124) 4X ( 25+2.5+0.25) + 1119.9X 6.9- 6.9X 3.9(125) 6.25+(17.2 3.6X4.5) +0.325.6X 99+5.6(126) 28.4X99+28.42.5X ( 1.9+1.9+1.9+1.9)(

10、127)0.94X2.5- 0.457.2+ 1.25 + 8.(128) 4X0.8X 12.5X 2.5128.4- (15+0.6) + 1.6(129) 17.5-0.25X 17+13.9.87X 99+9.87(130) 10.1 X87(119 )5.5X 17.3+6.7 X 5.5.2.3+3.19+ (22 19.8)(144)(9.6+1.48 + 3.7) +8(131)(132 )(133 )(134 )(135 )(136 )(137 )(138 )(139 )(140)(141)(142 )(143 )1.25 X 7.2.(145 ) 5.8 + 4 X ( 1

11、.34 - 0.14 )9.1 1.2+66.24(146 ) 5.4 + 0.51 + (1.2 1.03).7.3+12.8 3.8X 2.3(147) 21.35 3.25 16.75(5.36+7.64) + 13X 100(148) 33.02 ( 148.4 90.85 ) + 2.57.575+ (5.63 1.88) X 0.2.(149) 32X2.5 X 0.1257.5 (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(

12、152) 8X 16 73.8 X66.1+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 82.4 X 1.5+3.6 +1.5(155)0.8 X 13 - ( 3.12+5.28 )(156)102X 0.560.32 X 0.25+0.08 +4(157)1.53 X 1.7+0.47 X 1.7 .(170)91 + 2.6 +0.05=12.7+12.5+0.5(182)13.26+4.71+3.47+5.295.18+0.73+0.820.75 X 1.8 + 1.512.5 X

13、 7.1 X 0.86.12 X 99+6.128.6 + 0.86+8 X 0.355.6 X ( 18.5 8.5 +0.5 )0.125 X4.78 X 802.8 X 3.6+1.4 X2.8(0.4+40) X 2.578.7 17.7 X 3.6(171)6.3 X 3.7+6.3 X6.3=(172)(3.7+1.7 X 0.4 ) + 2.5=(173)7.28+3.2 +2.5=(174)0.74+0.9 X 7.4=(175)7.8 + 0.125 + 0.8=(176)37.5 + 0.3 X ( 1.34 0.84)(177)(2.5+27.75 + 1.5 ) X 1

14、.6 .(178)6.21 -3.8+2.2(179)6.03+3.7+2.97(180)17.43- 6.57- 2.43(158)(159)(160)(161)(162)(163)(164)(165)(166)(167)(168)(169)18+ 0.3 X (86.5)(181)20.47- ( 1.47+6.8)(183)22.74+8.68 13.74.(196)5.4-3 X ( 3.8- 2.9)(184)(185)(186)(187)(188)(189)(190)(191)(192)(193)(194)(195)0.4 X ( 3.2 0.8) + 0.1510+0.2 + 2

15、.5(197)5.7+1.9 X 0.2 +7.664X4.5+3.6X45(198)32.4 X 6.3+32.4 X 3.71.25X 3.2X0.8(199)18.2 10.6 X ( 0.9 0.75 )14.5X 102(200)0.25 X3.85 X 4014.64+3.7 X2.8(201)1.46 X3.5+3.5 X4.54 .8.4+ 0.21 +0.5.(202)7X 12.5X 0.80.125X 9X8X 0.3(203)4.7X 3.6+4.7X 6.44.62+5+0.66(204)1.45X (2.8+4.4) +2.4.5.78X2.3+5.78+5.78

16、X 6.7(205)4.2 X ( 6.18 3.03 ) +6.37.75X 20 + (3.24- 3.04) .(206)15.02 - 6.8 - ( 1.02+1.2 )1.25X 0.5 X8X 0.2(207)0.6 X (50.68 ) +1.20.97X 9+0.97(208)(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+1.4X 2.8(211)3.08 X 3.5+6.2 X 3.08+3.08 X 0.3 .(224)6.6+ 14.5- ( 1.

17、7+1.8)(212)2.3+3.91 - (22- 19.7)(225)0.25 X9.87 X4(213)21.6+ 64.8 (48.6 2.7X 2).(226)36.7 X 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 X0.4(228)0.73 X 102(216)2.7 X 1.5 -2.7(229)7.8 X5.6+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

18、.2 X 0.8 .(231)7.05 X 23.7+7.05 X 76.3 .(219)0.6+0.94 0.208(232) (7.6 5.2 ) + 0.4+2.54X 32.(220)4.85X 1.25X 8(233)17.68+5.2+2.7 X 1.5(221)(64 22.4+ 1.4) X 1.2(234)35.6-5X 1.73(1.1 0.78) X ( 2.7 1.95)(248)8X ( 20- 1.25)1.3 X 0.75 X4(249)0.654+10.9X6.51.08 + 1.8 X 1.2(250)22.7X1.25X 0.850.4 X 1.9 - 1.8(251)3.91 X 2.8+6.09 X 2.8.0.82 X 0.25+1.18 X 0.25 .(252)6.23+3.09=8.5X (2.36+2.42) + 0.25(253)132.4- 59.8=3.9+ (1.3+0.6) X 6 - 3.6(254)6.62X0.84=4.25X6.3+3.7X4.25(255)2.07 + 0.023=205 X 0.99(256)20.026 ( 8.6+9.7 ) X 0.92 +30.19 .25.6- 7.4