(987+4097×986)÷(987×4097-3110)

问题描述:

(987+4097×986)÷(987×4097-3110)

  因为4097-3110=987,
  所以原式可变为:
  (4097-3110+4097×986)÷(987×4097-3110)
  =[(4097×(986+1)-3110]÷(987×4097-3110)
  =(4097×986-3110)÷(987×4097-3110)
  =1(4097×986-3110)÷(987×4097-3110)这个结果好像不等于1。哈哈哈,对不起,粗心了,986+1都算错了。谢谢你指出我的错误!!!
倒数第二步4097×986-3110这里应该是4097×987-3110