五上数学小数混合运算计算题

小数混合运算培优测试卷2018.12一、计算题。

（共36分）1．直接写出得数2.6÷0.1= 1-0.09= 0.15×8= 1.5÷100=0.44÷0.22= 12.3×100= 1.8－0.08= 1.6＋0.04=24-14×0.3= 1.2×3÷1.2×3= 0.25×2.4= 4.59÷（4×0.25）=2．用竖式计算，带*的要验算3.5×0.67 64.8÷185.9×0.76（精确到百分位） *5.46÷2.7（保留三位小数）3．计算下面各题，能简便的用简便方法计算。

（12分）0.25－1.4＋3.75－0.6 0.45×2＋1.55÷0.530.1÷[（6.07＋2.53）×0.7] 5.7－0.45÷1.5×3二、填空题。

（每空1分，共22分）1. 0.12千米=（）米90秒=（）分3.2平方千米=（）公顷60时=（）日2.根据97×23=2231，把下面算式补充完整。

9.7×0.23=（） 2.231÷（）=23 0.097×（）=22.31 3.在○里填“＞，＜或＝”0.23×1.3○1.3 2.5÷0.73○2.5×0.731.36÷0.01○1.36×100 13.24÷16.1○14.小明在计算一个某数除以3.75时，把除号看成了乘号，结果是225，正确的答案是（）。

5.在2÷7的商的小数部分第15位是（），第150位是（）。

6.东东在计算一个数除以4.2时，由于将被除数的小数位数多看了一位，结果变成了2.4，正确的被除数是（）。

7.一个梯形的面积是2.4平方分米，上底为0.4分米，下底为0.8分米。

0＋160÷40120-144÷18+35347+45×2-4160÷52（58+37）÷（64-9×5）95÷（64-45）178-145÷5×6+42812-700÷（9+31×11）85+14×（14+208÷26）（284+16）×（512-8208÷18）120-36×4÷18+35(58+37）÷（64-9×5）(6.8-6.8×0.55)÷8.50.12×4.8÷0.12×4.8(3.2×1.5+2.5）÷1.63.2×（1.5+2.5）÷1.66-1.6÷47.2÷0.8-1.2×56.5×（4.8-1.2×410.15-10.75×0.4-5.7 5.8×（3.87-0.13）+4.2×3.7432.52-（6+9.728÷3.2）×2.(136+64）×（65-345÷23）420+580-64×21÷28(58+370）÷（64-45）6.9＋4.8＋3.10.456＋6.22＋3.7815.89＋(6.75－5.8）*64.02＋5.4＋0.985.17－1.8－3.213.75－(3.75＋6.48)*63.68＋7.56－2.687.85＋2.34－0.85＋4.6635.6－1.8－15.6－7.2 3.82＋2.9＋0.18＋9.1 9.6＋4.8－3.67.14－0.53－2.475.27＋2.86－0.66＋1.63 13.35－4.68＋2.65 73.8－1.64－13.8－5.36 47.8－7.45+8.80.398+0.36+3.6415.75+3.59－0.59+14.25 66.86－8.66－1.340.25×16.2×4(1.25－0.125)×83.6×1023.72×3.5＋6.28×3.536.8－3.9－6.115.6×13.1－15.6－15.6×2.1 4.8×7.8＋78×0.5232＋4.9－0.94.8×100.156.5×9.9＋56.57.09×10.8－0.8×425.48－(9.4－0.52)4.2÷3.518.76×9.9＋18.763.52÷2.5÷0.43.9－4.1＋6.1－5.95.6÷3.59.6÷0.8÷0.44.2×99＋4.217.8÷(1.78×4)0.49÷1.41.25×2.5×323.65×10.115.2÷0.25÷40.89×100.1146.5－(23＋46.5)3.83×4.56＋3.83×5.444.36×12.5×89.7×99＋9.727.5×3.7－7.5×3.7 8.54÷2.5÷0.40.65×1013.2×0.25×12.5 (45.9－32.7)÷8÷0.1253.14×0.68＋31.4×0.032 5.6÷1.25÷0.8÷2.5÷0.47.2×0.2＋2.4×1.48.9×1.017.74×（2.8－1.3）＋1.5×2.2 3.9×2.7＋3.9×7.318－1.8÷0.125÷0.812.7×9.9＋1.2721×（9.3－3.7）－5.6 15.02-6.8-1.025.4×11-5.42.3×16+2.3×23+2.39.43-（6.28-1.57）3.65×4.7－36.5×0.3746×57＋23×8613.7×0.25－3.7÷42.22×9.9+6.66×6.7 101×0.87-0.91×87 10.7×16.1-15.1×10.7 0.79×1994.8+8.63+5.2+0.375.93+0.19+2.811.76+0.195+3.242.35+1.713+0.287+7.65 1.57+0.245+7.436.02+3.6+1.980.134+2.66+0.8661.27+3.9+0.73+16.1 7.5＋4.9－6.53.07－0.38－1.628－2.45－1.53.25＋1.79－0.59＋1.75 23.4－0.8－13.4－7.20.32×4033.2＋0.36＋4.8＋1.64 1.23＋3.4－0.23＋6.6 0.25×3612.7－（3.7＋0.84）36.54－1.76－4.540.25×0.73×57.6×0.8＋0.2×7.60.85×1990.25×8.5×412.5×0.96×0.810.4－9.6×0.50.8×（4.3×1.25）3.12＋3.12×9928.6×101－28.30.86×15.7－0.86×14.7 2.4×1022.31×1.2×0.514－7.32－2.682.64＋8.67＋7.36＋11.33 70÷28（2.5－0.25）×0.49.16×1.5－0.5×9.16 3.6－3.6×0.563.4÷2.5÷0.44.9÷1.43.9÷（1.3×5）（7.7＋1.54）÷0.7 2.5×2.42.7÷4515÷（0.15×0.4）0.35×1.25×2×0.8 32.4×0.9＋0.1×32.4 15÷0.254.5÷1.89405-2940÷28×21 920-1680÷40÷7 690+47×52-398 148+3328÷64-75360×24÷32+7302100-94+48×5451+（2304-2042）×23 4215+（4361-716）÷81（247+18）×27÷2536-720÷（360÷18）1080÷（63-54）×80（528+912）×5-6178 8528÷41×38-904264+318-8280÷69（174+209）×26- 9000 814-（278+322）÷15 1406+735×9÷453168-7828÷38+504 796-5040÷（630÷7）285+（3000-372）÷361+5/6-19/123x(-9)+7x(-9(-54)x1/6x(-1/3)1.18.1＋（3－0.299÷0.23）×12.(6.8-6.8×0.55)÷8.53.0.12×4.8÷0.12×4.84.（3.2×1.5+2.5）÷1.6 （2）3.2×（1.5+2.5）÷1.65.6-1.6÷4= 5.38+7.85-5.37=6.7.2÷0.8-1.2×5= 6-1.19×3-0.43=7.6.5×（4.8-1.2×4）= 0.68×1.9+0.32×1.98.10.15-10.75×0.4-5.79.5.8×（3.87-0.13）+4.2×3.7410.32.52-（6+9.728÷3.2）×2.511.[（7.1-5.6）×0.9-1.15] ÷2.512.5.4÷[2.6×（3.7-2.9）+0.62]13.12×6÷（12-7.2）-614.12×6÷7.2-615.33.02－（148.4－90.85）÷2.57×(5/21+9/714)50.32.52-（6+9.728÷3.2）×2.5 0.45×2.5＝0.8×1.25＝0.3×3.6＝0.3×0.3＝10×0.07＝0.3×1.4＝0.05×7＝0.92×0.4＝0.2×0.26＝0.14×4＝0.02×0.1＝1.2×0.3＝0.2×0.4＝8.2＋1.8＝100－35.22＝2.3×4＝2.5×0.4＝2.4×5＝0.22×4＝3.25×0＝0.9－0.52＝3.99×1＝0×3.52＝12.5×8＝8÷10 = 10-1.8-7.2= 0.43+3.57= 2.5×4×12=0.9×0.8= 7.5x-3x = a+3a+7a== 1.05×100= 1÷0.5= 0.96÷3= 1.47÷0.7= 5.4÷6=0.16.5×10= 0.56×100= 3.78×100= 4÷0.8 =3.215×100= 0.8×10=4.08×100= 1.1×0.2 =0.6×0.8 = 3×0.9= 2.5×0.4= 3.6×0.4=12.5×8= 50×0.04= 80×0.3 = 1.1×9=0.16×5 ＝1.78＋2.2 = 9.6÷0.6 = 1.2×0.5-0.4 = 0.7÷0.01 = 2.5×0.4 = 12－3.9= 1.25×8÷1.25 = 6.6÷0.66 = 5.×0+4.63 = 3.9＋2.03＝4.2÷3.5＝1.6+2.4×0.3 = 2.14－0.9＝27＋456＋73= 0.3×0.3=7.2＋2.8＝0.9÷0.01＝12÷0.3= 2.87÷0.7＝13÷4＝0.96÷0.3＝1.5×0.4＝7÷0.25＝2.5×0.7×0.8= 8－2.5＝16÷1.6＝5.6×1.01= 8×（2.5＋0.25）＝0.36＋0.64＝64.32÷16＝4.2÷0.1＝72.8÷0.8＝8.4÷4.2＝13.8＋9.9＝2.4×2.5＝0.05×0.8＝ 2.56－0.37＝ 1.25×0.8×0.5＝12×2.5＝1.23×3＝3.2÷1.6＝3.5＋3.5×3＝19.6÷2＝8.8÷2.2= 0.75×4＝（1.5＋0.25）×4＝0.5×0.8=8.4×0.2= 1.6×0.2＝7.2×0.3= 2.8×0.3＝0.9÷0.15= 1.8×0.4= 5.5÷0.55= 0.08×100=2.2÷0.11= 5.46＋4.54= 12.5×0.8= 0.35×0.3=1.4×5=2.8×4= 19.6÷4= 22.5×4=2、用竖式计算0.396÷1.2= 0.756÷0.36= 15.6×13= 0.18×15= 0.025×14= 3.06×36= 0.04×0.12＝3.84×2.6≈5.76×3＝（保留一位小数）7.15×22 90.75÷3.3 3.68×0.25 16.9÷0.13 1.55÷3.9 3.7×0.016 13.76×0.8= 5.2×0.6 8.4×1.36.4×0.5 4.48×0.4 5.25×535.4×4.2 0.042×0.54 0.76×0.321. 3/7 ×49/9 - 4/32. 8/9 ×15/36 + 1/273. 12×5/6 –2/9 ×34. 8×5/4 + 1/46. 4/7 ×5/9 + 3/7 ×5/97. 5/2 -（3/2 + 4/5 ）8. 7/8 + （1/8 + 1/9 ）9. 9 ×5/6 + 5/610. 3/4 ×8/9 - 1/311. 7 ×5/49 + 3/1412. 6 ×（1/2 + 2/3 ）13. 8 ×4/5 + 8 ×11/514. 31 ×5/6 –5/615. 9/7 - （2/7 –10/21 ）16. 5/9 ×18 –14 ×2/717. 4/5 ×25/16 + 2/3 ×3/418. 14 ×8/7 –5/6 ×12/1519. 17/32 –3/4 ×9/2421. 5/7 ×3/25 + 3/722. 3/14 ××2/3 + 1/623. 1/5 ×2/3 + 5/624. 9/22 + 1/11 ÷1/225. 5/3 ×11/5 + 4/326. 45 ×2/3 + 1/3 ×1527. 7/19 + 12/19 ×5/628. 1/4 + 3/4 ÷2/329. 8/7 ×21/16 + 1/230. 101 ×1/5 –1/5 ×2131.50＋160÷4032.120-144÷18+3533.347+45×2-4160÷52 34（58+37）÷（64-9×5）35.95÷（64-45）36.178-145÷5×6+4237.812-700÷（9+31×11）38.85+14×（14+208÷26）39.（284+16）×（512-8208÷18）40.120-36×4÷18+3541.（58+37）÷（64-9×5）42.(6.8-6.8×0.55)÷8.543.0.12×4.8÷0.12×4.844.（3.2×1.5+2.5）÷1.6 （2）3.2×（1.5+2.5）÷1.645.6-1.6÷4= 5.38+7.85-5.37=46.7.2÷0.8-1.2×5= 6-1.19×3-0.43=47.6.5×（4.8-1.2×4）= 0.68×1.9+0.32×1.948.10.15-10.75×0.4-5.749.5.8×（3.87-0.13）+4.2×3.7450.32.52-（6+9.728÷3.2）×2.51.（136+64）×（65-345÷23）52. 420+580-64×21÷2853.（58+370）÷（64-45）6.9＋4.8＋3.1 0.456＋6.22＋3.78 15.89＋(6.75－5.8）*64.02＋5.4＋0.98 5.17－1.8－3.2 13.75－(3.75＋6.48)*63.68＋7.56－2.68 7.85＋2.34－0.85＋4.66 35.6－1.8－15.6－7.23.82＋2.9＋0.18＋9.1 9.6＋4.8－3.6 7.14－0.53－2.475.27＋2.86－0.66＋1.63 13.35－4.68＋2.65 73.8－1.64－13.8－5.3647.8－7.45+8.8 0.398+0.36+3.64 15.75+3.59－0.59+14.2566.86－8.66－1.34 0.25×16.2×4 (1.25－0.125)×83.6×102 3.72×3.5＋6.28×3.5 36.8－3.9－6.115.6×13.1－15.6－15.6×2.1 4.8×7.8＋78×0.52 32＋4.9－0.94.8×100.1 56.5×9.9＋56.5 7.09×10.8－0.8×725.48－(9.4－0.52) 4.2÷3.5 320÷1.25÷818.76×9.9＋18.76 3.52÷2.5÷0.4 3.9－4.1＋6.1－5.95.6÷3.5 9.6÷0.8÷0.4 4.2×99＋4.217.8÷(1.78×4) 0.49÷1.4 1.25×2.5×32 3.65×10.115.2÷0.25÷4 0.89×100.1 146.5－(23＋46.5)3.83×4.56＋3.83×5.44 4.36×12.5×8 9.7×99＋9.727.5×3.7－7.5×3.7 8.54÷2.5÷0.4 0.65×101 3.2×0.25×12.5(45.9－32.7)÷8÷0.125 3.14×0.68＋31.4×0.032 5.6÷1.25÷0.8÷2.5÷0.47.2×0.2＋2.4×1.4 8.9×1.01 7.74×（2.8－1.3）＋1.5×2.23.9×2.7＋3.9×7.3 18－1.8÷0.125÷0.8 12.7×9.9＋1.2721×（9.3－3.7）－5.6 15.02-6.8-1.02 5.4×11-5.42.3×16+2.3×23+2.3 9.43-（6.28-1.57）3.65×4.7－36.5×0.3746×57＋23×86 13.7×0.25－3.7÷4 2.22×9.9+6.66×6.7101×0.87-0.91×87 10.7×16.1-15.1×10.7 0.79×1994.8+8.63+5.2+0.37 5.93+0.19+2.81 1.76+0.195+3.242.35+1.713+0.287+7.65 1.57+0.245+7.43 6.02+3.6+1.980.134+2.66+0.866 1.27+3.9+0.73+16.1 7.5＋4.9－6.53.07－0.38－1.62 1.29＋3.7＋2.71＋6.3 8－2.45－1.53.25＋1.79－0.59＋1.75 23.4－0.8－13.4－7.2 0.32×4033.2＋0.36＋4.8＋1.64 1.23＋3.4－0.23＋6.6 0.25×3612.7－（3.7＋0.84）36.54－1.76－4.54 0.25×0.73×57.6×0.8＋0.2×7.6 0.85×199 0.25×8.5×41.28×8.6＋0.72×8.6 12.5×0.96×0.8 10.4－9.6×0.50.8×（4.3×1.25）3.12＋3.12×99 28.6×101－28.30.86×15.7－0.86×14.7 2.4×102 2.31×1.2×0.514－7.32－2.68 2.64＋8.67＋7.36＋11.33 70÷28（2.5－0.25）×0.4 9.16×1.5－0.5×9.16 3.6－3.6×0.5 63.4÷2.5÷0.4 4.9÷1.4 3.9÷（1.3×5）（7.7＋1.54）÷0.7 2.5×2.4 2.7÷45 15÷（0.15×0.4）0.35×1.25×2×0.8 32.4×0.9＋0.1×32.4 15÷0.250.25×0.046 2.52×3.4 1.08×250.12×0.5×0.16＝4.8×0.25＝0.125×1.4≈（保留两位数字2.5÷0.7= （保留三位小数）10.1÷3.3= （商用循环小数）10.75÷12.5= （用乘法验算）3.25×9.04= （用除法验算）3、脱式计算（能简算的要简算）2.5×7.1×4 16.12×99＋16.12 5.2×0.9＋0.97.28×99+7.28 4.3×50×0.2 64－2.64×0.526×15.7＋15.7×24 (2.275 ＋0.625)×0.283.94+34.3×0.2 1.2×(9.6÷2.4)÷4.88.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.468.05×3.4+7.6 6.58×4.5×0.9 2.8×0.5+1.5832＋4.9－0.9 4.8－4.8×0.5 (1.25－0.125)×84.8×100.1 56.5×99＋56.5 7.09×10.8－0.8×7.094.85 + 0.35 ÷1.4 8.7 ×17.4 - 8.7 ×7.412.5×0.4×2.5×8 0.87×3.16+4.64 9.5×1010.68 ÷（5.2 -3.5）×1.2540.5 ÷0.81 ×0.18 4.8 ×（15 ÷2.4）2．13.×0.×8257 6.81+6.81×99 0.25×185×40 4.4×0.8－3.4×0.8(9.37+9．37+9．37+9．37)×2．5 4．2.×1.＋1.×1.75 2.37×6.3+2.37×3.7 2.5×1.25×0.32 3.8×10.12.5×(3.8×0.04) 7.69×101 3.8×10.10.25×39+0.25 0.125×72 46×0.33+54×0.33(8×5.27) ×1.25 6.81+6.81×99 0.25×185×406.8×0.75÷0.5 3.75÷0.125–2.75 1.53+23.4÷7.29.5×99 13.5×0.98 12.5×8.8二、解方程：54-X=24 7X=49 126÷X=4213+A=28.5 2.4X=26.4 7.5x－3x=185×1.3-2x=5.5 24x+6x=63.6 5.6x+4.4x=5.2三、列式计算1、20减去0.8的差除以4个0.3的和，商是多少？2、一个数的2.6倍加上9，和是35，求这个数。

小数四则混合运算一、计算题。

1.先说出各题的运算顺序，再计算。

6.8÷(0.5＋0.3×4) 1.75－2.55÷1.7 0.324÷[(1.5－0.9)×0.9]3.5＋3.6÷4×0.8 1.32÷[(0.5＋0.6)×0.3] 6.3＋4.8÷82.用简便方法计算。

1.25×3.2×0.25 16－5.62－4.38 3.5×10.12.6＋5.84＋7.4 41×0.51－0.51 5.7×99(0.18＋0.18＋0.18＋0.18)×2.5 1.25×(8＋0.4)×0.25 2.5×3.20.82×2.7＋7.3×0.82 6.26×7.5＋0.75×37.4二、填空题。

1. )里写出运算律。

－(16.5＋0.6)＝30.5○○（）(2)15.3÷5÷0.6＝15.3÷（）(3)4.7＋18.6＋1.4＝4.7○ 1.4) （）(4)0.76×0.25×0.4×(0.25○0.4) （）(5)1.25×(4＋0.4)×4＋1.25（）2.每棵向日葵大约可收葵花籽0.25千克，1千克葵花籽可以榨油0.38千克。

小明今年种了400棵向日葵，大约可榨油（）千克。

3.如果☆＋○＝100，那么☆×0.081＋○×0.081＝（）；如果☆×○＝100，那么(☆×4.5)×○＝（）。

4.小明在用计算器计算4.9×9时，发现按键“9”坏了，他可以怎样输入计算出答案呢？写出算式：（）。

5.小马虎在计算5.4×(□＋2.5)时，错算成5.4×□＋2.5,那么他得到的结果比正确结果少（）。

五年级上小数乘除混合运算习题篇一：五年级小数乘除法计算题复习(含答案)五年级小数乘除法计算题练习一、计算题（30分）1、直接写出得数。

0.45某2.5＝1.1250.8某1.25＝10.3某3.6＝1.080.3某0.3＝0.0910某0.07＝0.70.3某1.4＝0.420.05某7＝0.350.92某0.4＝0.3680.2某0.26＝0.0520.14某4＝0.560.02某0.1＝0.0021.2某0.3＝0.360.2某0.4＝0.088.2＋1.8＝10100－35.22＝64.782.3某4＝9.22.5某0.4＝12.4某5＝120.22某4＝0.883.25某0＝00.9－0.52＝0.383.99某1＝3.990某3.52＝012.5某8＝1008÷10=0.810-1.8-7.2=10.43+3.57=42.5某4某12=1200.9某0.8=0.727.5某-3某=4.5某a+3a+7a=11a1.05某100=1051÷0.5=20.96÷3=0.321.47÷0.7=2.15.4÷6=0.90.165某10=1.650.56某100=563.78某100=3784÷0.8=53.215某100=321.50.8某10=84.08某100=4081.1某0.2=0.220.6某0.8=0.483某0.9=2.72.5某0.4=13.6某0.4=1.4412.5某8=10050某0.04=280某0.3=2.41.1某9=9.90.16某5=0.81.78＋2.2=3.989.6÷0.6=161.2某0.5-0.4=0.20.7÷0.01=702.5某0.4=112－3.9=8.11.25某8÷1.25=86.6÷0.66=105.37某0+4.63=4.633.9＋2.03＝5.934.2÷3.5＝1.21.6+2.4某0.3=2.322.14－0.9＝1.2427＋456＋73=5560.3某0.3=0.097.2＋2.8＝100.9÷0.01＝9012÷0.3=402.87÷0.7＝4.113÷4＝3.250.96÷0.3＝3.21.5某0.4＝0.67÷0.25＝282.5某0.7某0.8=1.48－2.5＝5.516÷1.6＝105.6某1.01=5.6568某（2.5＋0.25）＝220.36＋0.64＝164.32÷16＝4.024.2÷0.1＝4272.8÷0.8＝918.4÷4.2＝213.8＋9.9＝23.72.4某2.5＝60.05某0.8＝0.042.56－0.37＝2.191.25某0.8某0.5＝0.512某2.5＝301.23某3＝3.693.2÷1.6＝23.5＋3.5某3＝1419.6÷2＝9.88.8÷2.2=40.75某4＝3（1.5＋0.25）某4＝70.5某0.8=0.48.4某0.2=1.681.6某0.2＝0.327.2某0.3=2.162.8某0.3＝0.840.9÷0.15=61.8某0.4=0.725.5÷0.55=100.08某100=82.2÷0.11=205.46＋4.54=1012.5某0.8=100.35某0.3=0.1051.4某5=72.8某4=11.219.6÷4=4.922.5某4=902、用竖式计算0.396÷1.2=0.330.756÷0.36=2.115.6某13=202.80.18某15=2.70.025某14=0.353.06某36=110.160.04某0.12＝0.00483.84某2.6≈10.05.76某3＝17.28（保留一位小数）7.15某22=157.390.75÷3.3=27.53.68某0.25=0.9216.9÷0.13=1301.55÷3.9≈0.403.7某0.016=0.0592(保留两位小数)13.76某0.8=11.0085.2某0.6=3.128.4某1.3=10.926.4某0.5=3.24.48某0.4=1.7925.25某5=26.2535.4某4.2=148.680.042某0.54=0.022680.76某0.32=0.24320.25某0.046=0.01152.52某3.4=8.5681.08某25=270.12某0.5某0.16＝0.00964.8某0.25＝1.20.125某1.4≈0.18（保留两位小数）2.5÷0.7=3.571（保留三位小数）10.1÷3.3=3.06(06上面两个点)（商用循环小数）10.75÷12.5=0.86（用乘法验算）3.25某9.04=29.38（用除法验算）3、脱式计算（能简算的要简算）2.5某7.1某416.12某99＋16.125.2某0.9＋0.9=71=1612=5.587.28某99+7.284.3某50某0.264－2.64某0.5=72.8=43=62.6826某15.7＋15.7某24(2.275＋0.625)某0.28=785=0.8123.94+34.3某0.21.2某(9.6÷2.4)÷4.8=10.8=18.9某1.1某4.72.7某5.4某3.93.6某9.85-5.46=46.013=56.862=308.05某3.4+7.66.58某4.5某0.92.8某0.5+1.58=34.97=26.649=2.9832＋4.9－0.94.8－4.8某0.5(1.25－0.125)某8=36=2.4=94.8某100.156.5某99＋56.57.09某10.8－0.8某7.09=480.48=5650=70.94.85+0.35÷1.48.7某17.4-8.7某7.49.5某101=5.1=87=959.512.5某0.4某2.5某80.68÷(5.2-3.5)某1.25=100=0.540.5÷0.81某0.184.8某（15÷2.4）2.13某0某8257=9=30=06.81+6.81某990.25某185某404.4某0.8－3.4某0.8=681=1850=0.8(9.37+9.37+9.37+9.37)某2.52.37某6.3+2.37某3.73.8某10.1=93.7=23.7=38.382.5某1.25某0.323.8某10.12.5某(3.8某0.04)=1=38.38=0.380.25某39+0.250.125某7246某0.33+54某0.33=10=9=33(8某5.27)某1.256.81+6.81某990.25某185某40=52.7=68.1=18506.8某0.75÷0.53.75÷0.125–2.751.53+23.4÷7.2=10.29.5某99=940.5=27.25=4.7813.5某0.9812.5某8.8=13.23=110篇二：小数加减乘除混合运算训练题小数加减乘除及混合运算专项训练小数加减法（竖式计算方法）：相同数位对齐（小数点对齐），从低位算起。