Question

这道题的简便算法是？

Answer 1

=(3-0.13)x60
=3x60-0.13x60
=180-7.8
=172.2

Answer 2

2.87x 60 ＝ （3－0.13）x 60 ＝3x60-0.13×60=180-7.8=172.2

Answer 3

3*60-0.13*60

追答

180-7.8

172-2

172.2

Answer 4

2.87*10*6

追答

28.7*6

172.2

Answer 5

172.2

Answer 6