简便计算:(-124)/17+(+315)/17-(-165)/17

问题描述:

简便计算:(-124)/17+(+315)/17-(-165)/17

(-124)/17+(+315)/17-(-165)/17
=-124/17+315/17+165/17
=(-124/17+165/17)+315/17
=41/17+315/17
=356/17
=(340+16)/17
=20又17分之16