计算如下：369×64+369-369×45=369×(64+1-45)=369×20=7380
解；原式=369·（64+1-45）=369·20=7380。
369×64+369-369×45= 369×(64+1-45) = 369 x 20= 370 x 20 - 20 = 7400 - 20 = 7380
