连续除以两个数等于除以这两数的积,即原式=5000÷(4x49)=5000÷196=25.51020408
5000÷4÷49=5000÷(50-1)÷4=25.510204
5000÷4÷49=1250÷49=1250÷7÷7=171.4÷7=24.5