计算题小数乘除法.方程.小数加减法.doc

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1、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＋0.9     4.3×50×0.264－2.64×0.526×15.7＋15.7×24   (2.275＋0.625)×0.28 3.94+34.3×0.2  1.2×(9.6÷2.4)÷4.8   8.9×1.1×4.7     2.7×5.4×3.9    3.6×9.85-5.46   8.05×3.4+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

2、.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）×1.25      40.5÷0.81×0.18   4.8×（15÷2.4）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 2.37×6.3+2.37×3.7 2.5×1.2

3、5×0.32  3.8×10.12.5×(3.8×0.04)     7.69×1010.25×39+0.25 0.125×72 3.8×10.1  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    12.5×8.87.28×99+7.28    7.05×23.7+7.05×76.30.125×3.2×2.512.81－(1.5+7.81)8.7×2.6+6

4、.4×8.7+8.71025－1125÷4.5×3.612.25－3.1＋0.85－6.17（1.9－1.9×0.9）÷（3.8－2.8）2.65×1.7＋1.35×1.7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=5.2x＋3.86=5.4617.89－x=12.8940.8＋x=57.3x－3.25=162x＋0.82＝8.23＋0.5x＝77.8÷x＝2.680x÷

5、4＝125－0.9x＝2.752x＋0.4x=486－2x＋6x=180.52×5－4x=0.60.7(x＋0.9)=421.3x＋2.4×3=12.43.5x=1402x+5=4015x+6x=1685x＋1.5=4.513.7—x=5.29(写出检验过程)4.2×3—3x=5.120.5－4x=8.13.6x÷1.2=9.7518×1.5－1.7x=13.418.5x－9.9x=1.7219.2x+1.5x=32.17.2×5－8x=11.24x＋3×0.7＝6.5(口算)0.6×1.2=       0.84÷0.6=        4.5×0

6、.1=7.2＋2.8=12×2.5＝15×0.4=        0.1×0.5=         2.8÷7=2.63＋0.37＝0.96÷0.3＝100÷0.01=       1.4×3=           0.72÷8=1.5－4.5=2.5×0.4=6÷0.03=        0.5×0.6=          40×0.9=0.7×16－16×0.2=4÷0.5=          7×2.1=           8.89+0.1=1.4×2.5×4＝24×0.25=       0.1÷0.01=         2.4×0.8=

7、8－2.5＝6÷1.2=9×0.4=          10×0.01=          30.2-3.02=9.2÷2.3=4÷0.25=4.3-0.25=        1-0.82=           9.6÷0.3=24÷4＋56÷4＝4.8÷0.3=2.6×0.01=       0×25.4=           4.8×0.4=30×（200＋3）＝0.36＋0.64＝1.8×5=8.4÷4.2=8×1.5＝2.73＋1.5×4＝计算下面各题(能简算的要简算)7.05×23.7+7.05×76.30.125×3.2×2.512.81

8、－(1.5+7.81)8.7×2.6+6.4×8.7+8.71025－1125÷4.5×3.612.25－3