319×187+99×27-319×154的简便计算=319x（187-154）+99x27=319x33+33x3x27=319x33+33x81=（319+81）x33=400x33=13200
319×187+99×27-319×154=319×(187-154)+99×27=319×33+33×81=(319+81)×33=400×33=13200
