请问101×99-897怎样简便计算?谢谢

2025-03-01 21:26:40
推荐回答(4个)
回答1:

101×99-897
=(100+1)(100-1)-897
=100²-1-897
=10000-898
=10000-900+2
=9100+2
=9102.

回答2:

把原式写成以下形式
(100+1)x99-(900-3)
=9900+99-900+3
=9102

回答3:

(100+1)×(100-1)-(900-3)
=10000-1-900+3
=9102

回答4:

101×99-897
=(100+1)(100-1)-897
=10000-1-897
=9102