13/18*5.16+51.6*1/36简便

问题描述:

13/18*5.16+51.6*1/36简便

13/18*5.16+51.6*1/36
=13/18*5.16+5.16*10/36
=5.16x(13/18+10/36)
=5.16x(26/36+10/36)
=5.16x1
=5.16