用一台天平和1克,0.003千克,0.009千克的砝码各一个称重.当砝码只能放在同在同

问题描述:

用一台天平和1克,0.003千克,0.009千克的砝码各一个称重.当砝码只能放在同在同

0.003千克=3克,0.009千克=9克
当砝码只能放在同一边时,可以称出以下7种质量:
1,3,4,9,10,12,13
当砝码可以放在两边时,可以称出以下13种质量:
1,2,3,4,5,6,7,8,9,10,11,12,13