根据5.3×14=74.2,可知0.053×140= ,530×1.4= ,0.53×0.14= ,742÷1.4= .
9000﹣9= ×9.
计算:1.25×+1×﹣125%×= .
计算:5.62×49﹣5.62×39+43.8= .
计算:197×198﹣196×199= .
计算:7.816×1.45+3.14×2.184+1.69×7.816= .