原式
=99x98+98+100
=(99+1)x98+100
=100x98+100
=100x(98+1)
=100x99
=9900
供参考。
99x98+198的简便计算方法是:
99*98+198
=99*98+98+100
=98*(99+1)+100
=9800+100
=9900
这就是99*98+198的简便计算方法,计算结果等于9900。
99×98+198
=99x98+98+100
=(99+1)x98+100
=100x98+100
=100x(98+1)
=100x99
=9900