101乘99乘999加999的简便方法计算

2024-11-27 14:42:34
推荐回答(4个)
回答1:

=999×(101 × 99 +1)
=999 ×10000
=999 0000

回答2:

101×99×999+999
=【(100+1)×99】×999+999×1
=【100×99+1×99】×999+999×1
=【9900+99】×999+999×1
=9999×999+999×1
=(9999+1)×999
=10000×999
=9990000

回答3:

=(100+1)*(100-1)*999+999
=(10000-1)*999+999
=9990000

回答4:

101*99*999+999
=999*(101*99+1)
=999*(100*99+99+1)
=999*(9900+100)
=999*10000
=9990000