简便计算:899998-799999+89998-79999+8998-7999+898-799+88-79
问题描述:
简便计算:899998-799999+89998-79999+8998-7999+898-799+88-79
答
899998-799999+89998-79999+8998-7999+898-799+88-79
=(900000-800000+90000-80000+9000-8000+900-800+90-80)-5
=111110-5
=111105