小数乘除法练习题及简便计算

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1、一、计算题（30分）1、直接写出得数。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.＝    100－35.22＝    2.3×4＝.5×0.4＝      2.4×5＝      0.22×4＝      3.25×0＝0.9－0.52＝    3.99×1＝    

2、0×3.52=12.5×488÷10=   10-1.8-7.2=    0.43+3.57=    2.5×4×12=0.9×0.8=  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

3、=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=  5.37×0+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÷

4、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.

5、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

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          3.68×0.2516.9÷0.13      1.55÷3.9          3.7×0.01613.76×0.8=      5.2×0.6          8.4×1.3    6.4×0.5        4.48

7、×0.4          5.25×5  35.4×4.2      0.042×0.54          0.76×0.32        0.25×0.046      2.52×3.4          1.08×25          0.12×0.5×0.16＝    4.8×0.25＝      0.125×1.4≈、（保留两位小数）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）           

8、                           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