本题简便计算过程如下:149*69-149*32=149*(69-32)=149*37=(150-1)*(40-3)=150*40-450-40+3=6000-490+3=6000-487=6513
简便计算是直接提取公约数149得149x(69-32)=149x37=149x(40-3)=149x40-149x3=5960-447=5513加油💪!
149X69一149X32=149Ⅹ(69一32)=149X37=4470十1043=5513