Question

0.0938×6210-[210×0.006 8+（13.9×15.7+0.63×278-1.57×76）÷15]=______．

Answer 1

方法（1）原式=0.0938×6210-[210×0.006 8+（218.23+175.14-119.32）÷15]，
=0.0938×6210-[210×0.006 8+（218.23+175.14-119.32）÷15]，
=0.0938×6210-（210×0.006 8+274.05÷15），
=0.0938×6210-（1.428+18.27），
=582.498-19.698，
=562.8．
方法（2）原式=0.0938×6210-[210×0.0068+（13.9×15.7-15.7×7.6+6.3×27.8）÷15]
=0.0938×6210-[210×0.0068+（6.3×15.7+6.3×27.8）÷15]
=0.0938×6210-[210×0.0068+6.3×43.5÷15]
=0.0938×6210-[2.1×0.68+2.1×8.7]
=9.38×62.1-2.1×9.38
=9.38×60
=562.8．