1.9+39.9+19.9+199.9+0.4巧算求答!快!_数学解答

1.9+39.9+19.9+199.9+0.4巧算求答!
快!

人气：161 ℃　时间：2020-04-15 06:40:46

解答

1.9+39.9+19.9+199.9+(0.1+0.1+0.1+0.1)
=(1.9+0.1)+(39.9+0.1)+(19.9+0.1)+(199.9+0.1)
=2+40+20+200
=262