99×99+199怎么简便计算?

2025-03-21 11:41:45
推荐回答(4个)
回答1:

=99*(99+1)
=99*100
=9900

回答2:

99x(99+1)+100=1090

回答3:

=99x99+99+100
=(99+1)x99+100
=100x99+100
=100x(99+1)
=100x100
=10000

回答4:

(100-1)×(100-1)+99=(100×100)-(100×1)-(100×1)+(1×1)=10000-100-100+1=9801