问题
解答题
9999×9999+19999.
答案
9999×9999+19999,
=9999×9999+10000+9999,
=9999×(9999+1)+10000,
=9999×10000+10000,
=(9999+1)×10000,
=10000×10000,
=100000000.
9999×9999+19999.
9999×9999+19999,
=9999×9999+10000+9999,
=9999×(9999+1)+10000,
=9999×10000+10000,
=(9999+1)×10000,
=10000×10000,
=100000000.