小數(shù)四則混合運算專項練習題(能簡便的要簡便)

1、小數(shù)混合運算專項練習 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 X2.4(2)2.34 X 99+2.34(14)5.85 + ( 1.3+0.5 ) X 6.(3)5.4 -2.7 X0.8(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 X3.2 X 0.25 .(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 .(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 )83.7 12.83 0.17(38 )25.46- 8.23- 1.76(39 )2.9+

3、7.1 X 10(26 )5.96+13 X (3.2 - 3.12 )精選(27 )4.32 +2.4 X 1.7 ;(40 )1.25 X 32 X 0.25.(28 )16.2 X4.5+3.8 X 4.5 ;(41)15.68- ( 7.78 4.32) - 2.32(29 )9.05 3.86 3.14 ;(42 )0.25 X 3.2 X 1.25(30 )7.28+0.72 +0.9(43 )9.99X1.01314.32+5.43+6.68(44 )4.63X1.4+46.3X0.86(32 )17.17-6.8- 3.2(45 )17.5 + 0.8+ 12.5(33 )5.

4、29X 9+5.29(46 )0.9+9.9+99.9+999.9 .(34 )16.8X 10.1(47 )2.9X 99+2.9(35 )2.74X 9.5+5 X 0.274(48 )25X 11.2X4(36 )0.36+9.6 + 3.2.(49 )23.25- 6.75- 3.25.(37 )3.75X25+6.25X 25(50 )125X 3.2X 2.5(51)3.6X 10.1(64 )0.125X 32X 2.5(52 )5.8X 2.7+0.58 X 73(65 )0.8X6.3-0.8X3.8精選(53 )3.6+6.4X 1.8(66 )504+ 3.2X 2.08

5、(54 )(1.48+3.02) + ( 3.6X 0.5)(67 )(20 0.8X 9) X 5.7(55 )(36.7 4.9) X 101 31.8.(68)2.4X 1.5+3.6+ 1.5(56 )6.33X 101 6.33(69)7.38-5.14+3.62 2.86(57 )35.6 - 5X 1.73(70)0.12X1.8+8.2X0.12(58 )1.6X 55.4-55.4X 0.6(71)5.4+ 0.51 + (1.2 1.03)(59 )17.68+5.2+2.7X 1.5.(72) (8.15.6) X 0.91.05+ 0.04.(60 )1.08 X 0.

6、8 +0.27(73)10.8-0.8- ( 0.35+0.05)(61)102X0.45(74)8X 1 + ( 2.3-2.25)(62 )22.78 + 1.25 +0.8(75) 2.64X9.9+0.264(63 )0.34 X 101 - 0.34 .(76) 4.52+0.61+1.39+6.48(77 )4.27 ( 1.96 - 1.73 )(90 )9.6+0.4X0.25(91)29.7 + (5.85+0.65)(78 )(294.4 19.2 X 6) + ( 6+8)(92)7.4X 9.9(79 )12.5 X 0.76 X 0.4 X 8X 2.5 .精選(80

7、 )4.98+8.02X2.5(93 )3.84-2.7X 0.64(81)60.8 40.8+2.5(94)8.68 8.68+0.56X 0.5(82 )0.8X 69.6 X 12.5(95)4.7X4.7+4.7+4.3X4.7.(83 )4.98X99+4.9(96)2.72 + (8.2 6.5 ) X 0.5;(84 )6.48+3.2 + 2.5(97)9.12+9.12 X 9-60.2 ;(85 )1.2X 7.6+7.6X6.8.(98) 28.4 +0.4 +0.25 ;(86 )(9.4 5.8) X 2.07(99) 27.36 27.36 +7.6 .(87 )1

8、2.54- 4.56- 3.44- 1.54(100) 3.25 X 0.45+6.75 X 0.45(101) 31.5 24.5+3.5(88 )(9.36X 5+9.36+9.36X2) X 1.25(102) 7.5X102(89 )7.236+0.18 14.3X0.02.(103 )6.3+3.7X2.8.(116 ) 52.4- ( 15+0.6) + 1.6(117) 9.87X99+9.87(118 ) 46.8 + 0.9+0.4(104) 2.15+8.73+1.27+7.85(105) 11.87- ( 8.2+1.87)精選(106) 5.42- 3.87- 1.13

9、(119 )5.5X 17.3+6.7 X 5.5.(107) 4.38- 1.56+0.62 0.44(120) 99X4.2+4.2(108) 0.4X 270X2.(121) 0.25X1.25X 3.2(109)(40+1.25) X 8(122 ) 6.4 X 14+15 X 6.4+6.4(110 )(12.50.05) X 8(123)(1.3+1.3X 0.125X 8) + ( 80 77.4)(111) 2.6X 8.5+8.5X 7.4(124) 4X ( 25+2.5+0.25) + 111(112 ) 9.9X 6.9- 6.9X 3.9(125)6.25+(17.2

10、 3.6X4.5) +0.32(113 ) 5.6X 99+5.6(126) 28.4X99+28.4(114 )2.5X ( 1.9+1.9+1.9+1.9)(127)0.94X2.5- 0.45(115 )7.2+1.25 + 8.(128 )4X0.8X 12.5X 2.5(129 )17.5-0.25X 17+13.(142 ) 2.4 X 1.5+3.6 +1.5(130 )10.1X87(131) 2.3+3.19+ (22 19.8)(144)(9.6+1.48 + 3.7) +8(143) 0.32 X 0.25+0.08 +4精選(132)1.25X 7.2.(145 ) 5

11、.8 + 4 X ( 1.34 - 0.14 )(133 ) 9.1 1.2+66.24(146) 5.4 + 0.51 + (1.2 1.03).(134 )7.3+12.8 - 3.8X 2.3(147) 21.35 3.25 16.75(135)(5.36+7.64) + 13X 100(148)33.02 ( 148.4 90.85 ) + 2.5(136)7.575+ (5.63 1.88) X 0.2.(149)32X2.5 X 0.125(137)7.5 ( 5.5+1.24)(150)18.1+ (3 0.299 +0.23 ) X 1.1380.26+15.68+9.74+2

12、.32(151) 67- (2.98+0.67 )(139)13.26+9.55 -3.26(152) 8X 16 73.8 X6(140 )6.1+3.9 6.1+3.9.(153) (45+14) + 73+710.(154)13.7 X 0.125 X 8(141) 31.7 +0.63 (保留 2 位小數(shù))(155)0.8 X 13 (3.12+5.28 )(168)18+ 0.3 X (8 6.5 )精選(156)102X 0.56(169)12.7+12.5+0.5(157)1.53 X 1.7+0.47 X 1.7 .(170)91 + 2.6 +0.05=(158)5.18+0

13、.73+0.82(171)6.3 X 3.7+6.3 X6.3=(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 +0.5 )(176)37.5 + 0.3 X ( 1.34 0.84)(164)0.125 X4.78 X 80(177)(2.5+27.75

14、 + 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 2.5179)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) 7.75X 20+ ( 3.24 3.04).(182)13.26+4.71+3.47+5.29(194) 1.25X0.5X 8X 0.2(183)22.74+8.68 13.74.(195)0.97X9+0.97(184)10+0.2 + 2.5(196)5.4

15、-3 X ( 3.8- 2.9).(185)64X4.5+3.6X45(197)0.4 X ( 3.2 0.8) + 0.15(186)1.25X 3.2X0.8(198)5.7+1.9 X 0.2 +7.6(187)14.5X 102(199)32.4 X 6.3+32.4 X 3.7188)14.64+3.7 2.8(200)18.2 - 10.6 X ( 0.9 0.75 )(189)8.4+ 0.21+0.5.(201)0.25 X3.85 X 40(202)1.46 X3.5+3.5 X 4.54 .(190)0.125X 9X8X 0.3(203)7X 12.5X 0.8(191)

16、4.62+5+0.66204)4.7 3.6+4.7 6.4192)5.78 2.3+5.78+5.78 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(220)4.85X1.25X8(207) 15.02 - 6.8 - ( 1.02+1.2 )精選(208) 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

17、 - 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- ( 1.7+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(228)0.73 X 102(215) 0.25 X 0.8 X 0.125 X 0.4(216)2.7 X 1.5 -2.7

18、229)7.85.6+2.34.4217)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 X32.(245)2.5 (6.84.9) X 0.8.(246)102X 4.5(233)17.68+5.2+2.7X 1.5精選(234)35.6 5X 1.73(247)3.4+ (1.2+0.5) X 5(248)8X ( 20- 1.25)(235)(1.1 0.78) X ( 2.7 1.95)(236)1.3 X 0.75 X4(249)0.654+10.9X6.5(237)1.08 + 1.8 X 1.2(250)22.7X1.25X 0.8(238)50.4 X 1.9 - 1.8(251)3.91 X 2.8+6.09 X2.8.(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