简便计算;99分之98×98

问题描述:

简便计算;99分之98×98

(98/99)×98
=(98/99)×(99-1)
=(98/99)×99-(98/99)×1
=98-(98/99)
=97又99分之1

99分之98×98
=99分之98×(99-1)
=98/99*99-98/99
=98-98/99
=97又1/99

=99分之98×(99-1)
=99分之98×99-99分之98×1
=98-99分之98
=97又99分之1