123456789*987654321-123456788*987654322=多少简便计算脱式
问题描述:
123456789*987654321-123456788*987654322=多少简便计算脱式
答
123456789*987654321-123456788*987654322=(123456788+1)*987654321-123456788*(987654321+1)
=987654321-123456788
=864197533