1、小數(shù)混合運算 小數(shù)混合運算專項練習(xí)題（有答案）()XX(42)0.25X3.2X1.25(83)4.98X99+4.9()X(43)9.99X1.01(84)6.4823.222.5()三X(44)4.63X1.4+46.3X0.86()1.2X7.6+7.6X6.8.()X(45)17.520.8212.5(86)(9.4_5.8)X2.07()(46)0.9+9.9+99.9+999.9.(87)12.54_4.56_3.44_1.54()X.(47)2.9X99+2.9(88)(9.36X5+9.36+9.36X2)()X_(48)25X11.2X4X1.25(923.25_6.75_3

2、.25.(89)7.23620.18_14.3X0.02.()XX(50)125X3.2X2.5(90)9.620.4X0.25()X(-）三(51)3.6X10.1(91)29.72(5.8520.65)(52)5.8X2.7+0.58X73(92)7.4X9.9(0XX(53)3.6+6.4X1.8(93)3.84_2.7X0.64(1X.X(54)(1.48+3.02)2(3.6X0.5)(94)8.68_8.6820.56X0.5(54.7X4.7+4.7+4.3X4.7.()三X()(36.7_4.9)X101_()7(_)X(3X31.8.(4三5)X.(56)6.33X101_6

3、.33(7X_；(5_(57)35.6_5X1.73(822;(58)1.6X55.4_55.4X0.6(9_2(6X()17.6825.2+2.7X1.5.(100)3.25X0.45+6.75X0.45(0X三(101)31.5_24.523.5(7(1X(102)7.5X102(8X(2(103)6.3+3.7X2.8.(9_-2-(3X_(104)2.15+8.73+1.27+7.85()XX(64)0.125X32X2.5(105)11.87_(8.2+1.87)(1(65)0.8X6.3_0.8X3.8(106)5.42_3.87_1.13(2(66)50423.2X2.08(10

4、7)4.38_1.56+0.62_0.44(3三X5_)(7(20_0.8X9)X5.7(108)0.4X270X2.(4X(_6三(68)2.4X1.5+3.621.5(109)(40+1.25)X8(5_(69)7.38_5.14+3.62_2.86(110)(12.5_0.05)X8(6X(_)(70)0.12X1.8+8.2X0.12(111)2.6X8.5+8.5X7.4()三X(71)5.420.512(1.2_1.03)(112)9.9X6.9_6.9X3.9(8XX；(2(8.1_5.6)X0.9_1.05(113)5.6X99+5.6(9一_三0.04.(114)2.5X(1

5、.9+1.9+1.9+1.9)()(73)10.8_0.82(0.35+0.05)(31)4.32+5.43+6.68()7.221.2528.(32)17.17_6.8_3.2(74)8X12(2.3_2.25)(116)52.4_(15+0.6)21.6(33)5.29X9+5.29(52.64X9.9+0.264(117)9.87X99+9.87(34)16.8X10.1()(+18)46.820.920.4(35)2.74X9.5+5X0.274(7_7_)()5.5X17.3+6.7X5.5.(60.36+9.6三3.2.(8(_X)2(120)99X4.2+4.2(37)3.75X

6、25+6.25X25()(121)0.25X1.25X3.2(38)25.46_8.23_1.76(9XXXX(122)6.4X14+15X6.4+6.4(39)2.9+7.1X10(123)(1.3+1.3X0.125X8)2(01.25X32X0.25.(80)4.98+8.02X2.5(80_77.4)(41)15.68_(7.78_4.32)_(81)60.8_40.822.5(124)4X(25+2.5+0.25)21112.32(82)0.8X69.6X12.5小數(shù)混合運算 7.5752(5.63-1.88)X7.5-(5.5+1.24)X(178)6.21-3.8+2.2(179

7、)6.03+3.7+2.97(180)17.43-6.57-2.43(181)20.47-(1.47+6.8)(182)13.26+4.71+3.47+5.29(22.74+8.68-13.74.(184)1020.222.5(185)64X4.5+3.6X45(186)1.25X3.2X0.8(187)14.5X102(188)14.64+3.7X2.8(8.420.2120.5.(190)0.125X9X8X0.3(191)4.622520.66(192)5.78X2.3+5.78+5.78X6.7(7.75X202(3.24-3.04).0.26+15.68+9.74+2.3213.26

8、+9.55-3.266.1+3.9-6.1+3.9.(保留位小(XX()X(-X(X(-)(XX()X)(+(X(X(-8()X(-()(X(-)2(X()2-(XXX(212)2.3+3.912(22-19.7)(21.6264.8-(48.6-2.7X2).(XX(XXX(X-(XXX.()6.25三(17.2-3.6X4.5)三0.3228.4X99+28.40.94X2.5-0.454X0.8X12.5X2.517.520.25X17+13.10.1X872.3+3.192(22-19.8)()1.25X7.2.9.1-1.226-6.247.3+12.8-3.8X2.3(5.36+7

9、.64)213X100()0.2.(137)(138)(139)()()數(shù))()()()()()(194)1.25X0.5X8X0.2(195)0.97X9+0.97(5.423X(3.8-2.9).8X(-)(X2(XX(-X(-)(XX(XX(203)7X12.5X0.8(204)4.7X3.6+4.7X6.4(1.45X(2.8+4.4)22.4(X(-)0.6+0.94-0.2084.85X1.25X8(64-22.421.4)X1.218.3-6.25-3.752.8X3.6+1.4X2.8(6.6214.5-(1.7+1.8)TOC o 1-5 h z(XX(X(-X(7(XX(X

10、-X.(XX.(-)2X.17.6825.2+2.7X1.535.6-5X1.73()1.1-0.78)X(2.7-1.95)(XX(XX(X-(XX.(240)8.5X(2.36+2.42)20.25(241)3.92(1.3+0.6)X6-3.6(242)4.25X6.3+3.7X4.25(243)205X0.99(244)25.6-7.49-2.51(245)2.5-(6.8-4.9)X0.8.(246)102X4.5小數(shù)混合運算 (247)3.4三(1.2+0.5)X5(259)50.4三3.2X2.08(-X(248)8X(20-1.25)(260)204三(3.4X0.5)(249)0.654+10.9X6.5(261)(43.26+2.34)三7.5(XX(250)22.7X1.25X0.8(262)(20-0.8X9)X5.7.()2-0(3.91X2.8+6.09X2.8.(-)X.(252)6.23+3.09=(X；(273)1.56X1.7+0.44X1.