99ⅹ99+198怎样用简便方法计算?

2024-12-05 07:20:47
推荐回答(4个)
回答(1):

99×99+198
=99×99+99×2
=99×(99+2 )
=99×101
=99×(100+1)
=99×100+99
=9900+99
=9999

回答(2):

99×99+198
=99×99+99+99
=99×(99+1)十99
=9900+99
=9999

回答(3):

99x99+198
=99x99+99x2
=99x(99+2)
=99X(100+1)
=9900+99
=9999

回答(4):