2.5*[1/(6.1-6.09)] 和 4.21*99+42.1*0.1 怎么简算_数学解答

2.5*[1/(6.1-6.09)] 和 4.21*99+42.1*0.1 怎么简算

人气：357 ℃　时间：2019-11-06 20:08:18

解答

2.5*[1/(6.1-6.09)]
=2.5*1/0.01
=2.5*100
=2500
4.21*99+42.1*0.1
=4.21*99+4.21*10*0.1
=4.21*99+4.21*1
=4.21*(99+1)
=4.21*100
=421