春游时,每个人都有2份纪念品,3位老师和6个同学共要准备几份纪念品?6B*e5S4D9{,E
算式:提示5E-r/G,s8D0|.h8a*I6V7b0z3v6B*e5S4D9{,E
答;共要准备6~0\2u*g3q8v-x4O份纪念品。6B*e5S4D9{,E