是5.8x(3.87-0.13)+4.2x3.741吗？先算括号内3.87-0.13=3.74然后先乘除后加减，5.8x3.74=21.692 , 4.2x3.741=15.7122最后21.692+15.7122=37.4042
5.8*（3.87-0.13）+4.2*3.714=5.8*3.74+15.5988=21.692+15.5988=37.291
