张师傅每小时加工零件72个，加工了12小时，共加工零件多少个？7D/I'N*z+]8n*A
算式：提示)Q;D3o(])G5g/e'J'G.B;a9V;r8C7D/I'N*z+]8n*A
答：共加工2o-v;T:`)p)n:X8H*V,l+b/A,v个零件。7D/I'N*z+]8n*A