60×11/131+17×33/131,加220/131的简便运?

日期:2021-07-10 16:07:17 人气:1

60×11/131+17×33/131,加220/131的简便运?

60×11/131+17×33/131+220/131
=60x11/131+17x3x11/131+20x11/131
=(60+51+20)x11/131
=131x11/131
=11
    A+
热门评论