195 196 197 198 199怎样算简便 日期:2015-09-21 14:10:12 人气:2 195 196 197 198 199怎样算简便 195+196+197+198+199 =197-2+197-1+197+197+1+197+2 =197x5 =(200-3)x5 =1000-15 =985