99乘99+199的简便计算是什么

2024-11-04 09:20:53
推荐回答(4个)
回答1:

99x99+199
=99x99+99+100
=99x(99+1)+100
=99x100+100
=100x(99+1)
=10000

回答2:

(100-1)*99+199
=9900-99+199
=9900+199-99
=9900+100
=10000

回答3:

99*99+199=99*99+99+100
=99*(99+1)+100
=99*100+100
=100*(99+1)
=100*100
=10000

回答4:

99*99+199=(100-1)(100-1)+(100-1)+100
=(100-1)(100-1+1)+100
=(100-1)*100+100
=9900+100
=10000