(46+1)*28+46*36
=46*28+28+46*36
=46*(28+36)+28
(46+1)*28+46*36=46*28+28+46*36
=46*(28+36)+28=46*60+28=2788
46x28+28+46x36
=46x(28+36)+28
=2944+28
=2972
47*28+46*36
=(46+1)*28+46*36
=46*28+28+46+36
=46*(28+36)+28
=46*64+28
=2944+28
=2972
关键和觉得这样也不是简便呀