用竖式计算并验算.5.84+26.36=10.25﹣9.68=20﹣12.39=15.8+16.28=
计算:
竖式计算: 302×6= 108×8= 469×2= 654×8=
竖式计算: 308×9= 404×3= 560×4= 375×3=