9999×9999+19999用简便计算怎么算?

2025-03-21 10:54:54
推荐回答(4个)
回答(1):

9999×9999+19999
=9999×9999+10000+9999
=9999×(1+9999)+10000
=9999×10000+10000
=10000×(9999+1)
=10000×10000
=100000000

回答(2):

9999x9999+19999
=9999x9999+9999+10000
=9999x(9999+1)+10000
=99990000+10000
=100000000

回答(3):

=9999×9999+10000+9999
=9999×(9999+1)+10000
=9999×10000+10000
=(9999+1)×10000
=10000×10000
=100000000

回答(4):

=(10000-1)*(10000-1)+20000-1
=100000000-20000+1+20000-1
=100000000